Arbor Day originated in the United States during the early 1870s. The idea was conceived by J. Sterling Morton, a journalist and politician who moved from Detroit to the Nebraska Territory.&nbsp;



Morton was an agricultural enthusiast who recognized the environmental and economic value of trees. In the largely treeless plains of Nebraska, trees were needed for building materials, shade from the hot sun, and windbreaks to keep soil in place.



<h2 class="wp-block-heading" id="h-origins-of-arbor-day">Origins of Arbor Day</h2>



Morton first proposed a tree-planting holiday called "Arbor Day" at a meeting of the Nebraska State Board of Agriculture on January 4, 1872. The proposal was well received, and the first Arbor Day was celebrated in Nebraska on April 10, 1872. It was a huge success, with an estimated one million trees planted on that day.



The idea of an annual day specifically for planting trees quickly spread beyond Nebraska. Today, Arbor Day is observed in many countries around the world, each adapting the celebration to its own climate.&nbsp;



In the United States, it is typically celebrated on the last Friday in April, but many states observe the holiday on different dates that coincide with their local <a href="https://www.earth.com/news/planting-forests-with-diverse-tree-species-increases-likelihood-of-success/" target="_blank" rel="noreferrer noopener">tree planting</a> season. For example, Hawaii celebrates on the first Friday of November.



<h2 class="wp-block-heading" id="h-why-are-trees-so-important">Why are trees so important?</h2>



Trees are not just essential components of our natural landscape but vital guardians of our environment. These perennial plants do more than beautify our surroundings; they are fundamental to life on Earth.



<h3 class="wp-block-heading" id="h-ecological-benefits-of-trees">Ecological benefits of trees</h3>



The ecological significance of trees cannot be overstated. Primarily, they play a crucial role in mitigating climate change through carbon sequestration. Trees absorb <a href="https://www.earth.com/news/tree-rings-reveal-the-carbon-storage-capacity-of-a-forest/" target="_blank" rel="noreferrer noopener">carbon dioxide</a>, a predominant greenhouse gas, converting it into biomass through the process of photosynthesis. 



This not only reduces the amount of harmful gases in the atmosphere but also provides us with oxygen, essential for life. A mature leafy tree produces as much oxygen in a season as 10 people inhale in a year.



Furthermore, trees contribute to increased biodiversity. They serve as habitats for countless species. Birds, insects, fungi, and moss are just a few examples of the life forms that depend on trees for survival.&nbsp;



The variety of life supported by trees enhances genetic diversity, which is vital for adaptation and resilience in the face of environmental changes.



<h3 class="wp-block-heading" id="h-economic-benefits-of-trees">Economic benefits of trees</h3>



Economically, trees offer significant advantages. In urban areas, they improve home values by up to 15% or more due to their aesthetic appeal and their role in creating a pleasant microclimate.&nbsp;



Beyond aesthetics, trees provide raw materials for industries such as furniture, paper, and construction. Fruit and nut trees contribute to food resources, providing both nourishment and economic gains through agriculture.



Trees also have a profound impact on energy consumption. By providing shade and releasing moisture into the air through their leaves, trees can reduce the need for air conditioning in nearby buildings by 30%. This not only cuts down energy costs but also reduces the strain on power grids during peak summer months, thereby decreasing the likelihood of power outages.



<h3 class="wp-block-heading" id="h-health-benefits">Health benefits</h3>



The health benefits of trees extend beyond their environmental and economic contributions. They play a significant role in improving air quality by filtering pollutants such as dust, microplastics, and gases through their leaves and bark. Urban vegetation can reduce pollutants in the air by up to 25%, contributing to healthier <a href="https://www.earth.com/news/non-native-trees-have-enormous-value-in-urban-areas/" target="_blank" rel="noreferrer noopener">urban environments</a>.



Moreover, trees have been shown to have a positive impact on <a href="https://www.earth.com/news/urban-forest-bathing-fresh-breath-for-teen-mental-health/" target="_blank" rel="noreferrer noopener">mental health</a>. The presence of green spaces in urban areas can lower rates of psychological stress and illness. People living near trees often have lower levels of stress, and children diagnosed with attention deficit hyperactivity disorder (ADHD) show fewer symptoms when they have access to nature.



<h3 class="wp-block-heading" id="h-environmental-challenges">Environmental challenges</h3>



Despite their immense benefits, trees face numerous threats, including deforestation, land development, and climate change. These challenges underscore the need for concerted conservation efforts.&nbsp;



Planting trees is a simple yet powerful act that can lead to significant environmental improvements. Arbor Day and similar celebrations can serve as vital reminders of our responsibilities toward forest conservation and management.



<h2 class="wp-block-heading" id="h-significance-of-arbor-day">Significance of Arbor Day</h2>



Arbor Day is significant for several reasons, primarily centered around environmental awareness and conservation.



<h3 class="wp-block-heading" id="h-education-and-awareness">Education and awareness</h3>



Arbor Day serves as an opportunity to educate the public about the benefits that trees and <a href="https://www.earth.com/news/forests-play-an-overlooked-role-in-the-climate-system/" target="_blank" rel="noreferrer noopener">forests</a> provide to communities and the global environment. It encourages people to learn about tree care and forest management.



<h3 class="wp-block-heading" id="h-community-involvement">Community involvement</h3>



The day promotes community spirit as people come together to beautify their neighborhoods and public spaces. It is a chance for community engagement through collective action, which can strengthen community bonds and foster civic pride.



<h3 class="wp-block-heading" id="h-legacy-and-sustainability">Legacy and sustainability</h3>



Planting trees on Arbor Day is also about investing in the future. Trees planted today will grow to provide benefits for many years, making it a gesture of hope and sustainability for future generations.



Arbor Day serves as an important reminder that trees are more than just part of our natural landscape; they are essential for sustaining ecological balance, supporting economic development, and promoting health. By understanding and promoting the importance of trees, we can all contribute to a healthier, more sustainable world.&nbsp;



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Arbor Day: Honoring the guardians of our environment

Arbor Day originated in the United States during the early 1870s. The idea was conceived by J. Sterling Morton, a journalist and politician who moved from Detroit to the Nebraska Territory.&nbsp; Morton was an agricultural enthusiast who recognized the environmental and economic value of trees. In the largely treeless plains of Nebraska, trees were needed for building materials, shade from the hot sun, and windbreaks to keep soil in place. Origins of Arbor Day Morton first proposed a tree-planting holiday called "Arbor Day" at a meeting of...

Pouring Water Into Glass On Blue Background

California Expands Efforts To Protect Drinking Water. California regulators on Monday expanded their list of thousands of state-permitted <a href="https://www.bing.com/search?q=oil&amp;cvid=5c0910e0a09347979e3b50cffc334168&amp;FORM=ANAB01&amp;PC=HCTS">oil</a> and gas wells where below-ground injections may be contaminating drinking-water reserves.
State water officials already have acknowledged that improperly permitted oilfield operations have contaminated underground aquifers that are federally protected because they hold current or potential sources of drinking water.
An ongoing state review ordered by the U.S. Environmental Protection Agency has yet to break that down into whether any <a href="http://www.earth.com/news/oroville-dam-californian-catastrophe/">Californian</a> is drinking contaminated water as a result of the improperly authorized oilfield operations, a state water official said.
"We don't really know yet," and the answer "is not going to be tomorrow," John Borkovich, chief of the state water board's groundwater monitoring section, told reporters. "There's a lot of data to collect."
The review by state oil and gas regulators identified in 2014 more than 2,500 oilfield wells that were injecting brine and other production and waste fluids into the federally protected water aquifers. State regulators this year and last ordered oil companies to shut 23 central California oilfield injection wells - 22 in Kern County and one in Tulare County - that officials said posed the biggest potential threat to nearby public water wells.
On Monday, regulators released a state letter sent Friday to the U.S. EPA identifying an additional 30 oilfield injection sites as high-priority potential risks to nearby water wells. State officials told reporters they believed many or all of the threatened water wells were not currently being used for drinking water or irrigation, however.
Unlike in the previous 23 oilfield operations closed by emergency state orders, regulators will wait for the oil companies in charge of those 30 drilling sites to completely assess the threat to local water wells before officials decide whether to shut those immediately as well.
For the first time, state regulators also disclosed that regulators have allowed 3,604 oil-industry wells to carry out cyclic-steam injection - a production method that repeatedly injects steam underground at high pressure -outside the approved boundaries of oilfields.
Environmental groups and some state lawmakers contend those cyclic-steam injection wells are illegal. In an email, Steven Bohlen, state oil and gas supervisor, said it was doubtful those 3,604 wells would raise any additional concerns about groundwater because they were injecting into underground areas that already contained hydrocarbon.
Bohlen added that "a higher level of scrutiny on such wells may be called for in the future."
Federal officials have approved a state timeline that would stop all oilfield injection into federally protected water aquifers in California by February 2017.
"We are making good progress in addressing concerns about water quality that we all share," said Bohlen.
Some environmental organizations want the state to stop all oilfield injection into federally protected water aquifers immediately.
"I think it's remarkable that the extent of this crisis just keeps growing and yet state officials are doing essentially nothing to address it," said Kassie Siegel, senior counsel at the Arizona-based Center for Biological Diversity. "The commonsense first step is to stop the ongoing damage."
California is the country's third-biggest petroleum-producing state. Injection wells are involved in up to 85 percent of the state's production, the oil industry says.
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California Expands Efforts To Protect Drinking Water

California Expands Efforts To Protect Drinking Water. California regulators on...

Arctic Oil Drilling Preparations Continue Despite Protests. Neither a protest by hundreds of demonstrators nor a permit violation notice from the city will halt Royal Dutch Shell's use of a Seattle seaport terminal as it prepares for exploratory oil drilling in the <a href="https://www.bing.com/search?q=arctic+ocean&amp;cvid=d6543451de434e0ea018823d85e01f28&amp;FORM=ANAB01&amp;PC=HCTS">Arctic Ocean</a>, spokesmen say.
The violation notice issued Monday by the <a href="http://www.earth.com/news/wildfire-smoke-seattle-air-dangerous/">Seattle</a> Department of Planning and Development said use of Terminal 5 by a massive floating drill rig was in violation of the site's permitted use as a cargo terminal. The 400-foot Polar Pioneer and its support tug Aiviq must be removed from the terminal or Shell's host, Foss Maritime, must obtain an appropriate permit, the city indicated. Arctic Oil Drilling Preparations Continue Despite Protests
Possible fines start at $150 per day and can rise to $500 per day. The notice said the violation must be corrected by June 4. The companies can appeal and-or request extensions.
"It remains our view that the terms agreed upon by Shell, Foss and the Port of Seattle for use of Terminal 5 are valid, and it's our intention to continue loading-out our drilling rigs in preparation for exploratory drilling offshore Alaska," Shell spokesman Curtis Smith said.
"Terminal 5 is permitted to tie up ships while they are being loaded and unloaded," Foss Maritime spokesman Paul Queary said. "That is exactly what Foss is doing there."
Queary noted that both Foss and the Port of Seattle are appealing an earlier determination by the city that the use of Terminal 5 was not permitted. Monday's violation notice followed that determination.
Earlier Monday, protesters spent several hours blocking entrances to the terminal where the rig will be loaded before heading to waters off Alaska this summer.
Holding banners and flags, demonstrators marched across a bridge to Terminal 5, temporarily closing the road during Monday morning's commute. Once at the terminal, they spread out across the entrances and rallied, danced and spoke for several hours before leaving the site in the early afternoon.
Seattle City Councilmember Kshama Sawant was among the speakers. She said political leaders had failed to deal with climate change and called for "an escalating series of mass nonviolent civil disobedience until this madness is stopped," The Seattle Times reported.
Organizers had prepared to engage in civil disobedience to stop work on the drill rig, but Seattle police said Monday afternoon that no one had been arrested and the demonstration remained peaceful. A few dozen officers followed the march on foot and bicycle and kept watch at the terminal.
"I'm not planning to get arrested," protester Jennifer Jones told The Times. "It would be very inconvenient to get arrested in Washington state. We're from Portland."
The mass demonstration was the latest protest of the Polar Pioneer's arrival in Seattle. Protesters greeted the rig Thursday, and then hundreds of activists in kayaks and other vessels turned out Saturday for a protest dubbed the "Paddle in Seattle."
Smith said in an email Monday that the "activities of the day were anticipated and did not stop crews from accomplishing meaningful work in preparation for exploration offshore Alaska this summer."
There were minimal operations at Terminal 5, "so there's not much to block," Port of Seattle spokesman Peter McGraw said. The operator of Terminal 18, a major hub of port activity where the march began, closed those gates in anticipation of the demonstration, he said.
Officials have been urging people to exercise their First Amendment rights safely, and "that's what we've been seeing so far," McGraw said.
The activists say they are concerned about the risk of an oil spill in the remote Arctic waters and the effects that tapping new frontiers of oil and gas reserves will have on global warming. Officials in Alaska have touted the economic benefits that drilling could bring there and to the Pacific Northwest.
On Monday, protesters of all ages sang, rapped and danced at the vehicle gate of Terminal 5. They chanted and held signs saying "Climate Justice For All" and "You Shell Not Pass."
Lisa Marcus, 58, a musician who participated in Saturday's protest, turned up with her "Love the planet" sign for another day of activism Monday.
"We've got to wake up" to the dangers of human-caused climate change, she said, ticking off a list of environmental problems that the world is facing. "Shell is trying to make it worse, and that's not acceptable."
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Arctic Oil Drilling Preparations Continue Despite Protests

Arctic Oil Drilling Preparations Continue Despite Protests. Neither a protest...

The Sunniest States Are Lagging Behind On Solar Power Production.Residents of the Sunshine State are finding that harnessing Florida's abundant solar power is no simple task.
With its bounty of sunny days, Florida ranks third in the nation in rooftop solar energy potential but 13th in the amount of solar energy generated, according to industry estimates.
The industry views Florida as a sleeping giant that could rival California in solar potential, but renewable energy experts say the state lags behind because old laws favor utilities over private enterprise.
"The rules are set up so there isn't competition right now, and competition could be healthy," said James Fenton, director of the Solar Energy Center at the University of Central Florida.
This has made unlikely allies of groups like the Sierra Club and the tea party, who view the lack of consumer choice as harmful to the environment and an infringement on personal freedom. The groups are working on a 2016 ballot initiative that would change Florida's constitution to allow businesses other than utilities to sell solar power to consumers.
Utilities say solar, with 2 percent of the market, is growing slowly in Florida because energy costs are 30 percent lower than the national average, making it a bad financial choice.
They say Florida's energy mix - dominated by natural gas (62 percent), coal (21 percent) and nuclear (12 percent) - is cheaper than solar power generated from rooftop panels.
Florida is one of only four states that require solar energy be sold exclusively by utilities, banning sales from companies that install rooftop solar panels at little or no cost and then sell the energy generated to the property owner. The result is limited options for going solar and increased upfront financial commitment for consumers.
The state also taxes commercial property owners who install solar arrays, further hurting investment potential.
Scott McIntyre of Tampa-based Solar Energy Management, a panel installer, said the company has lost large projects from shopping centers and other commercial real estate owners. He said companies come to him wanting to build solar on their rooftops so they can sell energy to their tenants but drop the idea when they learn about the legal limits on electricity sales.
"We're trying to provide Floridians with solar power," McIntyre said. "But there are no incentives for commercial solar in Florida. None."
California and other successful solar states allow companies to lease rooftop solar arrays to homeowners and bill them monthly for the electricity created. This lets homeowners get into the market for little or no money down and pay as they go.
Florida also trails in other areas, like wind, because it has yet to pass laws mandating that utilities to create more renewable energy - a tactic used by 30 other states and Washington.
The utilities benefit from rules established generations ago that made them "regulated monopolies."
Florida Power and Light Co., the state's largest electric company with 4.7 million customers, has built three large-scale solar developments and is planning at least four more, including one at Daytona International Speedway. Florida's Duke Energy is also planning to build large solar power plants by 2024.
"Large-scale solar investment remains the most economical and fairest way to advance solar energy for our customers while keeping our rates low," FPL spokesman Mark Bubriski said in an email. "We also plan to triple our use of solar energy before the end of 2016."
Florida's utilities favor large-scale solar power plants as a way to stay financially viable in a changing energy market, said Fenton of the solar energy center.
For people who want to wean themselves off the utilities, few options are left. State utilities were mandated to offer rebates for a few years, but after the mandate ended, FPL chose not to offer them any longer.
Self-described "tree hugger" Cynthia Schaefer, a financial planner who lives near Miami, said the $34,000 solar panel project installed on her rooftop was not financially feasible. Still, her goal of reducing her environmental impact drove her to figure out how to make it work. In the end - and after two years of trying - she got an FPL rebate for $18,500, which shaved off more than half the upfront cost.
"It wouldn't have made financial sense to do it without the rebate," Schaefer said.
In the first month, the installation cut her electric bill by about $110 a month to $9.
FPL ended the rebates this year after the state program approved by regulators ended. The utility also said it believes they are unfair.
"It just doesn't make sense to provide customers a cash incentive - that's paid for by the rest of our customers," Bubriski said about the rooftop solar panel rebates.
FPL and Tampa Electric said they wouldn't comment on the initiative, which has about 100,000 of the 700,000 signatures needed to qualify for the 2016 election. A Duke spokesman said the company is studying it closely.
"If the initiative takes off, then the solar industry will take off," McIntyre said.
---
Follow Jason Dearen on Twitter: <a href="http://www.twitter.com/JHDearen" target="_blank" rel="noopener">http://www.twitter.com/JHDearen</a>
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The Sunniest States Are Lagging Behind On Solar Power Production

The Sunniest States Are Lagging Behind On Solar Power Production.Residents...

France And Germany Commit To Global Climate Protection. France And Germany Commit To Global Climate Protection. German Chancellor Angela Merkel and French President Francois Hollande confirmed their commitment to global climate protection Tuesday, gathering with others in Berlin to prepare for this year's U.N. Climate Change Conference.
Merkel and Hollande said in a joint statement that both countries "are firmly decided to take all efforts to reach an ambitious, comprehensive and binding U.N. climate agreement by the end of this year in Paris."
The preparatory talks in Berlin involve 35 countries. The <a href="https://www.bing.com/search?q=paris&amp;cvid=fad06b959f934720b0e85dcaabe0ea38&amp;FORM=ANAB01&amp;PC=HCTS">Paris</a> summit in December aims to curb climate change and rising <a href="http://www.earth.com/news/the-window-to-avoid-dangerous-global-warming-is-narrowing/">global</a> temperatures, which scientists say are largely driven by carbon emissions.
The European two leaders said they "are committed to the goal of limiting global temperature increases at least to below 2°C compared with pre-industrial levels."
To achieve this goal, they said a fundamental shift of investment into low-carbon infrastructure and technologies is needed as well as climate-friendly land use.
They also said countries already threatened by "unavoidable risks and damage arising from climate change" need to be strengthened in their resilience.
Merkel has made climate protection one of the key goals of her political agenda, and Germany wants to focus on it at the G-7 summit next month in Bavaria. Under Merkel's lead, Germany began to phase out nuclear power after Japan's 2011 Fukushima disaster in Japan and has since then invested heavily in renewable energy.
For some critics, those reforms do not go far enough.
Activists from Greenpeace and other environmental groups protested Tuesday in Berlin, placing a model of Paris' Eiffel Tower converted into a wind turbine in front of the city's Brandenburg Gate. They demanded a faster energy transition away from nuclear power and coal and toward the use of 100 percent renewable energies by 2050.
The German government plan is one of the world's most ambitious, calling for renewable energies, including wind and sun, to make up 40-45 percent of Germany's energy mix by 2025, compared with just under a quarter now, and 55-60 percent by 2035.
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France And Germany Commit To Global Climate Protection

France And Germany Commit To Global Climate Protection. France And...

Oil Spill Stains California Coastline, Cleanup Efforts Underway. Slicks of oil that spilled into California coastal waters from an onshore pipeline spanned a total of 9 miles Wednesday, and a company official said the line was operating at full capacity when it broke, suggesting much more oil escaped than initially estimated.
The oil that spilled Tuesday off southern Santa Barbara County formed two slicks, said Coast Guard Capt. Jennifer Williams, one of two federal response coordinators.
Before a morning flyover, the oil was estimated to span 4 miles of ocean.
The spill from a Plains All American Pipeline LP pipe was initially estimated at 21,000 gallons, but officials were not relying on that. <a href="http://www.earth.com/news/unhealthy-foods-spoil-the-benefits-of-a-mediterranean-diet/">Oil</a> Spill Stains California Coastline, Cleanup Efforts Underway
Company official Darren Palmer said Wednesday it remained unknown how much oil actually spilled.
But he said the pipeline was running at a rate of 2,000 barrels an hour - equivalent to 84,000 gallons.
The pipe was built in 1991 and underwent integrity testing a few weeks ago, he said.
Palmer said the company took responsibility for the spill and would pay for the cleanup.


[caption id="attachment_2381769" align="alignleft" width="300"]<a href="http://cff1.greenatom.net/uploads/2015/05/oil-spill-clean-up_AP.jpg"><img class="size-medium wp-image-2381769" src="http://cff1.greenatom.net/uploads/2015/05/oil-spill-clean-up_AP-300x201.jpg" alt="Clean up workers place shovels of oil-laden sand in bags while a larger group of workers begin clean up operations at Refugio State Beach, site of an oil spill, north of Goleta, Calif., Wednesday, May 20, 2015. (AP Photo/Michael A. Mariant)" width="300" height="201" /></a> Clean up workers place shovels of oil-laden sand in bags while a larger group of workers begin clean up operations at Refugio State Beach, site of an oil spill, north of Goleta, Calif., Wednesday, May 20, 2015. (AP Photo/Michael A. Mariant)[/caption]
Workers from an environmental cleanup company strapped on boots and gloves and picked up shovels and rakes Wednesday to tackle the gobs of goo stuck to sand and rocks along Refugio State Beach.
The rupture happened on the same stretch of coastline as a 1969 spill that was the largest ever in U.S. waters at the time and is credited with giving rise to the American environmental movement.
Members of the International Bird Rescue organization also were on hand Wednesday to clean any birds that become covered with oil, though none were immediately spotted in the calm seas that produced small waves.
Fan Yang, 26, of Indianapolis, stood on a bluff overlooking the beach, where the stench of petroleum was heavy.
"It smells like what they use to pave the roads," said Yang, who was hoping to find cleaner beaches in Santa Barbara. "I'm sad for the birds - if they lose their habitat."
The broken 24-inch pipeline spewed oil down a storm drain and into the Pacific Ocean for several hours Tuesday before it was shut off.
Authorities responding to reports of a foul smell near Refugio State Beach around noon found a half-mile slick in the ocean, county fire Capt. Dave Zaniboni said.
Plains All American Pipeline said in a statement it was making every effort to limit the environmental impact.
The state Department of Fish and Wildlife has closed fishing and shellfish harvesting for a mile east and west of the beach.
The area is home to offshore oil rigs, and small amounts of tar from natural seepage regularly show up on beaches. In 1969, several hundred thousand gallons spilled from a blowout on an oil platform and thousands of seabirds and many marine mammals were killed.
The oil industry brings risks, said Bob Deans, spokesman for the Natural Resources Defense Council.
"Santa Barbara learned that lesson over 40 years ago when offshore drilling led to disaster," he said in a statement.
The Santa Barbara-based Environmental Defense Center said having the spill occur in a sensitive and treasured environment is devastating to watch. The group was concerned about whales that migrate through the area.
"Oil spills are part of the ugly cost of fossil fuel development, made even worse by aging domestic infrastructure," said Miyoko Sakashita, oceans director for the Center for Biological Diversity.
It was unclear how long the cleanup would take and whether Refugio beach and other areas would be reopened in time for Memorial Day weekend.
<a id="fd43f9c3-f002-42ac-8e3a-461b1470d7d6" href="http://hosted.ap.org/dynamic/stories/U/US_CALIFORNIA_OIL_SPILL?SITE=AP&amp;SECTION=HOME&amp;TEMPLATE=DEFAULT&amp;CTIME=2015-05-20-15-32-36#fd43f9c3-f002-42ac-8e3a-461b1470d7d6" rel="item-license">© 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.</a> Learn more about our <a href="http://hosted2.ap.org/APDEFAULT/privacy">Privacy Policy</a> and <a href="http://hosted2.ap.org/APDEFAULT/terms">Terms of Use</a>.

Oil Spill Stains California Coastline, Cleanup Efforts Underway

Oil Spill Stains California Coastline, Cleanup Efforts Underway. Slicks of...

Obama Says Climate Change Poses National Security Threat. President Barack Obama has argued for action on climate change as a matter of health, environmental protection and international obligation. On Wednesday, he added national security.
Those who deny global warming are putting at risk the United States and the military sworn to defend it, he told cadets at the U.S. Coast Guard Academy. Failure to act would be "dereliction of duty," their commander in chief said.
He said climate change and rising sea levels jeopardize the readiness of U.S. forces and threaten to aggravate social tensions and political instability around the globe.
The president's message to climate change skeptics was unequivocal: "Denying it or refusing to deal with it undermines our national security"
"Make no mistake, it will impact how our military defends our country," Obama said on a crisp, sunny morning at Cadet Memorial Field. "We need to act and we need to act now."
Seated before him were 218 white-uniformed graduates, pondering where military service will take them in life.
Obama drew a line from climate change to national security that had multiple strands:
-increased risk of natural disasters resulting in humanitarian crises, with the potential to increase refugee flows and worsen conflicts over food and water.
-aggravating conditions such as poverty, political instability and social tensions that can lead to terrorist activity and other violence.
-new threats to the U.S. economy from rising oceans that threaten thousands of miles of highways, roads, railways and energy facilities.
-new challenges for military bases and training areas from seas, drought and other conditions.
"Around Norfolk, high tides and storms increasingly flood parts of our Navy base and an air base," Obama said of military facilities in Virginia. "In Alaska, thawing permafrost is damaging military facilities. Out West, deeper droughts and longer wildfires could threaten training areas our troops depend on."
Preparing for and adapting to climate change won't be enough, he said. "The only way the world is going to prevent the worst effects of climate change is to slow down the warming of the planet."
He laid out his administration's steps to reduce carbon greenhouse gas emissions, including strict limits on emissions from vehicles and power plants. The government expects those emission reductions to provide the U.S. contribution to a global climate treaty that world leaders are expected to finalize in December. Obama said it doesn't take a scientist to know that climate change is happening.
The evidence is "indisputable," he said.
Without identifying the skeptics or those who resist action on climate change, Obama acknowledged the difficult terrain in Washington. "The politics will be tough, but there is no other way." He repeated: "This will be tough."
Obama's climate change agenda has drawn strong political opposition from the GOP-led Congress and faces a number of legal challenges. Many Republican lawmakers either have denied the science of climate change or have distanced themselves from it, saying they lack the expertise to issue an opinion.
Some of the 2016 GOP presidential candidates have rejected unilateral moves to address the issue, saying it could hurt the U.S. economy.
Obama had a determined and hopeful response to all of that, but one not likely to be fulfilled: "This cannot be subject to the usual politics and the usual rhetoric." Obama Says Climate Change Poses National Security Threat
His message was reinforced by Secretary of State John Kerry, just back from meetings in Asia. Kerry said in a statement that the idea of climate change as a national security issue "was a primary topic of discussion" throughout his conversations with Asian leaders.
Retired Rear Adm. David Titley, of the private Center for Climate and Security, said Obama's "rhetoric is all good," but he was waiting to see if the administration commits enough money to deal with the challenges the president identified.
Obama's appearance at the Coast Guard Academy was his second and last commencement address of the season after speaking earlier in May at a community college in South Dakota. The president traditionally delivers a commencement address every year to one of the service academies.
Later Wednesday, he was visiting Stamford, Connecticut, for a Democratic fundraiser at a private home. About 30 supporters were contributing up to $33,400 each.
---
Associated Press writer Darlene Superville in Washington contributed to this report.
---
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Obama Says Climate Change Poses National Security Threat

Obama Says Climate Change Poses National Security Threat. President Barack...

California Drought Affects State's Oldest Water Rights Holders.<a href="https://www.bing.com/search?q=California&amp;cvid=67241fe5ee1942e8ab3b8c90f08f2f08&amp;FORM=ANAB01&amp;PC=HCTS"> California</a> farmers holding water rights that date as far back as the Gold Rush are bracing for their first state-ordered conservation in decades, as a record drought prompts some of the deepest cuts yet in the country's most productive agricultural state.
After telling cities and towns to slash use by 25 percent and curtailing water deliveries to some farmers and others, state officials said Wednesday they would start mandatory cuts this week to the state's oldest rights holders, historically spared from water restrictions. California Drought Affects State's Oldest Water Rights Holders
Regulators said those first orders Friday will impact holders of century-old water rights in the watershed of the San Joaquin River, which runs from the <a href="http://www.earth.com/news/sierra-nevada-mountains-taller/">Sierra Nevada</a> mountains to San Francisco Bay and is one of the main water sources for farms and communities.
Meanwhile, a second category of senior rights holders - farmers who hold longstanding claims to water because their land lies along the waterways of the Sacramento-San Joaquin river delta - are making a surprise effort to stave off that kind of curtailment order.
They are offering to voluntarily reduce their water use by a quarter. Officials promised a decision Friday on that offer, which would yield on some of the most iron-clad water rights in California, as they try to chart a path forward for a state locked in its driest four-year period on record.
"For me, 25 percent I can handle," said Gino Celli, who farms 5,000 acres of tomatoes, alfalfa and corn in the delta. "Anything more than that, man, I'm done."
It is unclear whether the farmers' offer of voluntary cuts would go far enough to save waterways that are drying up around much of the state, following a winter of below-average rainfall and record-low snows in the Sierra Nevada.
Farmers use 80 percent of all water taken from the land in California. Senior water rights holders alone consume trillions of gallons of water a year, although the state doesn't know exactly how much water they use because of unreliable data collection.
Regulators don't have widespread remote sensors or meters to make sure water isn't diverted.
The cutback orders instead are enforced by honor system and complaints. Only a fifth of junior water rights holders already told to stop pumping from the San Joaquin watershed have confirmed they were complying, a water board official said Wednesday.
Agriculture experts say they expect only modest immediate impact on food prices from any cuts to the senior water-rights holders.
Farmers will likely use their limited water to grow valuable crops - like almonds - and less valuable crops - like alfalfa - will be grown outside of California, said Jay Lund, director of the Center for Watershed Sciences at the University of California, Davis.
The mandatory cuts scheduled for Friday would be the first to the state's senior-water rights holders overall since the 1970s, and first to senior water-rights holders along the San Joaquin in memory.
"This is challenging. It's not about making everyone happy," said Felicia Marcus, chairwoman of the state Water Resources Control Board, told participants at a public hearing Wednesday on the drought. "It's about figuring out how to make terrible choices in the most fair and equitable way possible."
Board Director Tom Howard said that whatever he decides on the farmers' offer will apply beyond the river delta to the entire basin of the Sacramento River, which supplies most of the surface water in the food-producing Central Valley and the drinking water to homeowners as far south as San Diego.
That deal would not apply to hundreds of other right holders with claims to water before 1914, among few groups spared cutbacks in four years of record dry, until now.
California's water rights system - which Gov. Jerry Brown acknowledges as "somewhat archaic" - is built around the claims staked in the 19th century. Nearly 4,000 companies, farms and individuals are first in line to receive water because they made claims to water before 1914 or have property touching a waterway.
The ranks of senior water-rights holders include the cities of San Francisco and Los Angeles and rural irrigation districts that supply thousands of farms.
Regulators haven't ordered those claimants to stop pumping since 1977, during the state's last major drought. That order applied only to dozens along a stretch of the Sacramento River, and the water board has since gained new power to punish those who illegally take water, including $10,000 daily penalties.
Delta farmer Rudy Mussi already has ordered tomato plants and prepared fields, and said he needs to know how often, or if, he can water them.
"Until the fine print is out, I don't know," Mussi said Wednesday about joining the farmers' offer of 25 percent cuts. "If I can make it work, hey, I'll do my darndest."
Brown has come under criticism for sparing farmers with senior water rights from the mandatory cutbacks. Increasing amounts of the state's irrigation water goes to specialty crops like almonds, whose growers are expanding production despite the drought.
Mandatory orders could put some farmers in the Delta east of San Francisco out of business, said John Herrick, manager of the South Delta Water Agency.
When the state cutback order comes, Herrick said, the farmers will immediately try to block it in court.
"That doesn't mean we'll win," Herrick said. "But that's what we'll do."
---
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California Drought Affects State's Oldest Water Rights Holders

California Drought Affects State's Oldest Water Rights Holders. California farmers...

Examining Climate Impacts of Natural Gas vs Diesel. Some major trucking companies are turning to natural gas to fuel their fleets -- and to earn "green" credit among customers. But celebrating lower emissions could be premature, according to an analysis in the ACS journal Environmental Science &amp; Technology. Researchers have found that converting heavy-duty trucks to run on natural <a href="http://www.earth.com/news/giant-animals-vanished-from-madagascar-after-humans-arrived/">gas</a> could lead to negative climate impacts if steps are not taken to improve engine efficiency and reduce methane emissions from the fuel's supply chain. Examining Climate Impacts of Natural Gas vs Diesel

Burning natural gas emits less carbon dioxide (CO2) into the atmosphere than other fossil fuels, but the process of getting natural gas out of the ground and delivering it through pipelines releases methane, a much more potent greenhouse gas than CO2. So, Jonathan Camuzeaux and colleagues wanted to investigate the climate impacts of switching to natural gas in different types of heavy-duty trucks.

The researchers examined a range of assumptions for methane leakage and several different kinds of commercial, natural-gas truck engines. They calculated that switching heavy-duty truck fleets from diesel to natural gas could lead to worse climate impacts over the next 50 to 90 years than remaining with diesel due to methane's high potency as a greenhouse gas in the near term. But, they added, reducing methane losses from the supply chain and improving natural gas engine efficiency could make switching fuels climate-friendly.

---

Credit: <a href="http://www.acs.org">American Chemical Society</a>

Examining Climate Impacts of Natural Gas vs Diesel

Examining Climate Impacts of Natural Gas vs Diesel. Some major...

California Drought Affects State's Oldest Water Rights Holders. California farmers holding water rights that date as far back as the Gold Rush are bracing for their first state-ordered conservation in decades, as a record drought prompts some of the deepest cuts yet in the country's most productive agricultural state.
After telling cities and towns to slash use by 25 percent and curtailing water deliveries to some farmers and others, state officials said Wednesday they would start mandatory cuts this week to the state's oldest rights holders, historically spared from water restrictions.
Regulators said those first orders Friday will impact holders of century-old water rights in the watershed of the San Joaquin River, which runs from the Sierra Nevada mountains to San Francisco Bay and is one of the main water sources for farms and communities.
Meanwhile, a second category of senior rights holders - farmers who hold longstanding claims to water because their land lies along the waterways of the Sacramento-San Joaquin river delta - are making a surprise effort to stave off that kind of curtailment order.
They are offering to voluntarily reduce their water use by a quarter. Officials promised a decision Friday on that offer, which would yield on some of the most iron-clad water rights in California, as they try to chart a path forward for a state locked in its driest four-year period on record.
"For me, 25 percent I can handle," said Gino Celli, who farms 5,000 acres of tomatoes, alfalfa and corn in the delta. "Anything more than that, man, I'm done."
It is unclear whether the farmers' offer of voluntary cuts would go far enough to save waterways that are drying up around much of the state, following a winter of below-average rainfall and record-low snows in the Sierra Nevada.
Farmers use 80 percent of all water taken from the land in California. Senior water rights holders alone consume trillions of gallons of water a year, although the state doesn't know exactly how much water they use because of unreliable data collection.
Regulators don't have widespread remote sensors or meters to make sure water isn't diverted.
The cutback orders instead are enforced by honor system and complaints. Only a fifth of junior water rights holders already told to stop pumping from the San Joaquin watershed have confirmed they were complying, a water board official said Wednesday.
Agriculture experts say they expect only modest immediate impact on food prices from any cuts to the senior water-rights holders.
Farmers will likely use their limited water to grow valuable crops - like almonds - and less valuable crops - like alfalfa - will be grown outside of California, said Jay Lund, director of the Center for Watershed Sciences at the University of California, Davis.
The mandatory cuts scheduled for Friday would be the first to the state's senior-water rights holders overall since the 1970s, and first to senior water-rights holders along the San Joaquin in memory.
"This is challenging. It's not about making everyone happy," said Felicia Marcus, chairwoman of the state Water Resources Control Board, told participants at a public hearing Wednesday on the drought. "It's about figuring out how to make terrible choices in the most fair and equitable way possible."
Board Director Tom Howard said that whatever he decides on the farmers' offer will apply beyond the river delta to the entire basin of the Sacramento River, which supplies most of the surface water in the food-producing Central Valley and the drinking water to homeowners as far south as San Diego.
That deal would not apply to hundreds of other right holders with claims to water before 1914, among few groups spared cutbacks in four years of record dry, until now.
California's water rights system - which Gov. Jerry Brown acknowledges as "somewhat archaic" - is built around the claims staked in the 19th century. Nearly 4,000 companies, farms and individuals are first in line to receive water because they made claims to water before 1914 or have property touching a waterway.
The ranks of senior water-rights holders include the cities of San Francisco and Los Angeles and rural irrigation districts that supply thousands of farms.
Regulators haven't ordered those claimants to stop pumping since 1977, during the state's last major drought. That order applied only to dozens along a stretch of the Sacramento River, and the water board has since gained new power to punish those who illegally take water, including $10,000 daily penalties.
Delta farmer Rudy Mussi already has ordered tomato plants and prepared fields, and said he needs to know how often, or if, he can water them.
"Until the fine print is out, I don't know," Mussi said Wednesday about joining the farmers' offer of 25 percent cuts. "If I can make it work, hey, I'll do my darndest."
Brown has come under criticism for sparing farmers with senior water rights from the mandatory cutbacks. Increasing amounts of the state's irrigation water goes to specialty crops like almonds, whose growers are expanding production despite the drought.
Mandatory orders could put some farmers in the Delta east of San Francisco out of business, said John Herrick, manager of the South Delta Water Agency.
When the state cutback order comes, Herrick said, the farmers will immediately try to block it in court.
"That doesn't mean we'll win," Herrick said. "But that's what we'll do."
---
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California Oil Spill Becoming Huge Disaster. More than 7,700 gallons of oil has been raked, skimmed and vacuumed from a spill that stretched across 9 miles of California coast, just a fraction of the sticky, stinking goo that escaped from a broken pipeline, officials said.
Up to 105,000 gallons may have leaked from the ruptured pipeline Tuesday, and up to 21,000 gallons reached the sea just north of Santa Barbara, according to estimates. The environmental impact still is being assessed, but so far there is no evidence of widespread harm to birds and sea life.
The early toll on wildlife from the California oil spill included two oil-covered pelicans, officials said. Biologists counted dead fish and crustaceans along sandy beaches and rocky shores.
The spill occurred along a long, rustic coast that forms the northern boundary of the Santa Barbara Channel, home to a rich array of sea life. Whales, dolphins, sea lions, seals, sea otters and birds such as pelicans live along the channel between the mainland and the Channel Islands, five of which are a national park surrounded by waters declared a national marine sanctuary.
Workers in protective suits have shoveled black sludge off beaches, and boats towed booms into place to corral two oil slicks. The cleanup effort continued through the night and additional crew members and boats came out early Thursday, U.S. Coast Guard Lt. Jonathan McCormick said.
They could get help from expected light winds and calm seas, said Dr. Sean Anderson, an environmental scientist at California State University, Channel Islands.
"When the water's choppy, the response gets complicated. But since the water's nice and flat, the oil sticks together and it's easier to spot and easier to pick up," he said.
Regulators and workers with Plains All American Pipeline LP, which runs the pipeline, aim to begin excavating the pipe Thursday to get their first look at the breach.
The company's chief executive visited the spill site Wednesday and apologized.
"We deeply, deeply regret that this incident has occurred at all," Chairman and CEO Greg L. Armstrong said at a news conference. "We apologize for the damage that it's done to the wildlife and to the environment."
Crude was flowing through the pipe at 54,600 gallons an hour during the leak, the company said. Company officials didn't say how long it leaked before it was discovered and shut down or discuss how fast the oil escaped.
Federal regulators from the Department of Transportation, which oversees oil pipeline safety, investigated the leak's cause, the pipe's condition and the potential violations.
The 24-inch pipe built in 1991 had no previous problems and was thoroughly inspected in 2012, according to the company. The pipe underwent similar tests about two weeks ago, though the results had not been analyzed yet.
The Los Angeles Times reported that the company accumulated 175 safety and maintenance infractions since 2006, according to federal records. The infractions involved pump failure, equipment malfunction, pipeline corrosion and operator error. The newspaper said a Plains Pipeline spokesman did not immediately respond to a request for comment about its regulatory record.
There was no estimate on the cost of the cleanup or how long it might take.
A combination of soiled beaches and the pungent stench of petroleum led officials to close popular campgrounds Refugio State Beach and El Capitan State Beach over the Memorial Day weekend.
Still, tourists pulled off the Pacific Coast Highway to eye the disaster from overlooking bluffs.
"It smells like what they use to pave the roads," said Fan Yang, of Indianapolis, who was hoping to find cleaner beaches in Santa Barbara, about 20 miles away. "I'm sad for the birds - if they lose their habitat."
The state Department of Fish and Wildlife closed fishing and shellfish harvesting for a mile east and west of Refugio beach and deployed booms to protect the nesting and foraging habitat of the snowy plover and the least tern, both endangered shore birds.
Gov. Jerry Brown on Wednesday night declared a state of emergency, a move that frees up additional state funding to help with the cleanup.
The coastline was the scene of a much larger spill in 1969 - the largest in U.S. waters at the time - that is credited with giving rise to the American environmental movement.
Environmental groups used the spill as a new opportunity to take a shot at fossil fuels and remind people of the area's notoriety with oil spills.
"Big Oil comes with big risks - from drilling to delivery," said Bob Deans, spokesman for the Natural Resources Defense Council. "Santa Barbara learned that lesson over 40 years ago when offshore drilling led to disaster."
Large offshore rigs still dot the horizon off the coast, pumping crude to shore and small amounts of tar from natural seepage regularly show up on beaches.
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California Oil Spill Becoming Huge Disaster

California Oil Spill Becoming Huge Disaster. More than 7,700 gallons...

Judge: Gulf Oil Leak Details Can't Be Kept Secret. A federal magistrate judge Wednesday rejected a company's bid to preserve the confidentiality of numerous emails and reports about its failed efforts to halt a decade-old Gulf of Mexico oil leak.
The documents could be evidence in a lawsuit that a coalition of environmental groups, led by the New York City-based Waterkeeper Alliance, filed against Taylor Energy Co. The New Orleans-based company owned an oil platform that toppled during Hurricane Ivan in 2004.
An Associated Press investigation recently revealed evidence that the leak at the site of the toppled platform is worse than Taylor or government regulators had publicly reported.
U.S. Magistrate Judge Karen Wells Roby rejected a series of arguments by Taylor lawyers who said the documents contain commercially valuable trade secrets and private information - including research on efforts to stop leaks and geological information about the site.
Wells Roby didn't immediately issue a formal ruling. Once she does, Taylor can ask a district judge to review it before any documents are publicly released.
The AP has filed a public records request for some of the same confidential records.
Attorneys for the environmentalists have access to the information in question. But keeping it confidential would essentially tie attorneys' hands, restricting what they could say about the records or how they could use them at a trial set for later this year.
"It's just not practical to hold this trial in secret," said Adam Babich, a Tulane Environmental Law Clinic lawyer representing the Waterkeeper Alliance.
Documents that the alliance seeks to make public include email correspondence involving the Coast Guard, reports prepared for the government regulators overseeing the leak response efforts, expert reports by scientists and engineers and documents used by those experts in forming opinions about the spill.
The Waterkeeper Alliance sued in 2012. The group said Taylor turned over more than 15,000 pages of documents and initially stamped all but four pages as confidential under a protective order. Roby said she may order changes to the protective order, saying it is overly broad.
The lawsuit seeks penalties against Taylor for violations of the Clean Water Act in connection with the ongoing spill. Judge: Gulf Oil Leak Details Can't Be Kept Secret
A Taylor spokesman declined immediate comment after Wednesday's hearing. Phyllis Taylor, the company's chairman and CEO, declined to be interviewed Wednesday after testifying at a legislative hearing in Baton Rouge on an unrelated matter.
Last year, Taylor presented federal officials with plans for a "final resolution" at the site where a mudslide triggered by Ivan's waves also buried a cluster of oil wells under mounds of sediment. Details of that plan are among the records still under wraps, but the company has said nothing can be done to completely eliminate chronic sheens at the site.
Federal regulators suspect oil is still leaking from at least one of 25 buried wells. In 2012, officials ordered the company to install a new and improved "containment dome" to capture leaking <a href="http://www.earth.com/news/unhealthy-foods-spoil-the-benefits-of-a-mediterranean-diet/">oil</a>, but a Coast Guard document obtained by the AP said the company hadn't finished designing the new dome as of May 1.
AP also obtained a "fact sheet" prepared this month by the Interior Department that says the leak could continue for a century or more "if left unchecked."
But a company official has said that experts agree the "best course of action ... is to not take any affirmative action" due to the risks associated with additional work at the site.
---
Associated Press Writer Michael Kunzelman in Baton Rouge contributed to this story.
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Judge: Gulf Oil Leak Details Can't Be Kept Secret

Judge: Gulf Oil Leak Details Can't Be Kept Secret. A...

California Farmers Agree To Voluntary Water Cuts. California farmers who hold some of the state's strongest water rights avoided the threat of deep mandatory cuts when the state accepted their proposal to voluntarily reduce consumption by 25 percent amid one of the worst droughts on record.
Officials hope the deal agreed upon on Friday will serve as a model for more such agreements with growers in the nation's top-producing farm state, where agriculture accounts for 80 percent of all water drawn from rivers, streams and the ground.
"We're in a drought unprecedented in our time. That's calling upon us to take unprecedented action," Felicia Marcus, chairwoman of the state Water Resources Control Board, said in announcing the agreement.
The rare concession from the farmers is the latest indication of the severity of the water shortage in California, which is suffering through its driest four years on record.
California water law is built around preserving the rights of so-called senior rights holders - farmers and others whose acreage abuts rivers and streams, or whose claims to water date back a century or more, as far back as Gold Rush days.
The offer potentially could cover hundreds of farmers in the delta of the Sacramento and San Joaquin rivers, the heart of California's water system. About 25 percent of all California river water runs through the delta, according to the state's Department of Water Resources.
Some of the farmers made the offer after state officials warned they were days away from ordering the first cuts in more than 30 years to the senior water rights holders' allotments.
The state already has ordered cities and towns to cut their water use by 25 percent, and it has curtailed water deliveries to many other farmers. But in recent weeks, many city dwellers and others have complained that agriculture should be made to share more of the sacrifice.
Rudy Mussi, whose family farms about 4,000 acres in the delta southwest of Stockton, reacted with mixed emotions about state approval of the deal.
"The 25 percent savings, that gives us certainty," Mussi said. "But at the same time I'm being asked to give up 25 percent of my paycheck."
By itself, the delta farmers' offer would not go far enough to save shrinking waterways statewide. But if more farmers sign on across the state, <a href="https://www.bing.com/search?q=California&amp;cvid=67241fe5ee1942e8ab3b8c90f08f2f08&amp;FORM=ANAB01&amp;PC=HCTS">California</a> could save significant amounts of water, since the nearly 4,000 senior water rights holders alone consume trillions of gallons a year.
The agreement "is an illustration of creative practical approaches that water managers in the state of California are taking to help get us all through this devastating drought," said Michael George, state water master for the delta.
California produces nearly half of the fruits, nuts and vegetables grown in the U.S., but agriculture experts say they would expect only modest immediate effects on food prices from any reduction in water for the senior water rights holders. Other regions would be able to make up the difference, economists say.
Under the deal, delta farmers have until June 1 to lay out how they will use 25 percent less water during the summer. That could include irrigating their crops less or leaving some of their land fallow.
In exchange, the state gave assurances to the farmers it will not cut the remaining 75 percent of the water to which they are entitled. California Farmers Agree To Voluntary Water Cuts
"When your back is up against the wall, I guess you'll do anything," said Paul Wenger, president of the California Farm Bureau Federation and an almond grower in the Modesto area, outside of the delta. He said he is skeptical the deal will protect the farmers if the drought worsens.
Senior water rights holders last saw their water cut in 1977, but that move applied only to dozens of people along a stretch of the Sacramento River.
Ellen Hanak, a water policy expert at the Public Policy Institute of California think tank, said senior water rights holders don't necessarily face complete water cutoffs, as people with less venerable claims to water have endured.
"It's important for people to realize that there are haircuts that are partial - they don't necessarily mean shaving everything off," Hanak said.
Any accord with delta farmers would probably rely largely on the honor system. California currently does not require monitoring or meters for superior rights holders.
---
Knickmeyer reported from San Francisco and Smith reported from Fresno. Terry Chea in Stockton and Fenit Nirappil in Sacramento contributed to this story.
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California Farmers Agree To Voluntary Water Cuts

California Farmers Agree To Voluntary Water Cuts. California farmers who...

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Today’s Video of the Day from <a href="https://www.igb.illinois.edu/">Carl R. Woese Institute for Genomic Biology</a> reveals how scientists can modify common crops like soybean, rice, and wheat to protect them from heat stress.



“We need to double crop production by 2050 to feed a growing global population, and not only are we not on track to do that, but climate change is further complicating things,” said Amanda Cavanagh, a lecturer at the University of Essex. 



The study is part of Realizing Increased Photosynthetic Efficiency (RIPE), an international research project that aims to develop food crops that turn the sun’s energy into food more efficiently.



“Using an engineering approach we designed multiple alternative metabolic pathways to photorespiration. Testing them in the field showed increases in productivity which led Amanda to significantly move the project forward by showing our engineered plants can withstand pretty extreme temperature stress,” said study co-author and RIPE researcher Paul South.&nbsp;



“As the climate changes and temperature stresses increase the pressure on our global food supply, farmers will need every tool available including engineering approaches like the synthetic biology used here to maintain safe and productive harvests.”



The experts tested plants modified to have more efficient photorespiration to see if they were better adapted to warmer temperatures.&nbsp;



The team found that the engineered plants produced 26 percent more biomass than the wild-type plants exposed to the same temperatures, and had 15 percent less yield loss under the higher temperatures.



Video Credit: Amanda Nguyen/University of Illinois



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Designing crops that can beat the heat

[sendtonews key="QGPzYnXEtN-1712599-12187" type="single"] Today’s Video of the Day from Carl...

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes the first comprehensive estimate of carbon density in the Saharan, Sahel, and Sudanian zones of Africa. In an effort to measure the amount of carbon stored across these drylands, a team of scientists used high-resolution satellite images and artificial intelligence to map nearly 10 billion individual trees. 



"The high spatial resolution (50 cm) combined with AI and field measurements used in this study is key to improving tree inventories in drylands," said Pierre Hiernaux, a French researcher working for NASA. "The ever-increasing availability of very high-resolution satellite imagery will make it possible to assess carbon pools and their dynamics at the individual tree level on a global scale."



"This study is exceptional because it is pioneering a type of approach that will revolutionize the monitoring of trees and forests on a global scale: in the short term, it will be possible to map the world's trees from the centre of the Amazon to our schoolyards," said <a href="https://www.inrae.fr/en">INRAE</a> researcher Jean-Pierre Wigneron.



"Many fields of application will become much more efficient and accurate, such as tracking carbon stocks, biodiversity, monitoring logging and protection against illegal forest degradation, in near real time.”



Video Credit: NASA Goddard&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Remote sensing will revolutionize the way we monitor trees

[sendtonews key="EjmSP20gQK-2593093-12187" type="single"] Today's Video of the Day from NASA...

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Lesotho: Africa's "Kingdom in the Sky" Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features northwest Lesotho in South Africa.



According to ESA, Lesotho is the only nation in the world that lies completely above 1,000 m in elevation. The country is famous for its tall mountains and narrow valleys, and is known as Africa's "Kingdom in the Sky."



Out of a population of around two million people, about 80 percent live in rural areas. More than 75 percent of these people are engaged in <a href="https://www.earth.com/news/climate-change-will-have-a-global-impact-on-agriculture/">agriculture</a>, including rainfed cereal production and animal grazing.&nbsp;



ESA reports that the country’s agricultural system faces a growing number of issues, with climate-related vulnerabilities such as drought, floods and extreme temperatures occurring more frequently. 



Diamonds are amongst the minerals found in the mountains. Indeed, Lesotho can truly be called the Kingdom in the Sky. Beautiful, culturally rich, safe, affordable, and easily accessible from Durban and Johannesburg, mountainous Lesotho is a vastly underrated travel destination. the Kingdom of Lesotho (Sotho: 'Muso oa Lesotho) is an enclaved country in southern Africa. It is just over 30,000 km2 (11,583 sq mi) in size and has a population of around 2 million.



Video Credit: ESA&nbsp;&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer 



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Lesotho: Africa's "Kingdom in the Sky"

[sendtonews key="uV9Lh2fQbV-1760058-12187" type="single"] Lesotho: Africa's "Kingdom in the Sky" Today’s...

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> features a visual dataset of.methane emissions from wetlands across the globe. Atmospheric methane levels have reached record highs in recent years, and wetlands are a major source of these emissions.&nbsp;



"Methane is an important greenhouse gas that contributes substantially to global warming. On a molecule by molecule basis, methane is much more efficient at trapping heat than carbon dioxide, the main driver of warming," says NASA.



"Though human activities, including agriculture, oil and natural gas production and use, and waste disposal, collectively contribute the majority of methane to the atmosphere, about a third of total methane emissions comes from wetlands."&nbsp;



According to NASA, understanding methane emissions from wetlands and other natural sources is critically important for scientists and policymakers who are working to combat climate change by reducing emissions from human activities.



Video Credit: NASA Goddard



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Wetlands are a major source of methane emissions

[sendtonews key="f8fukm28Vz-2491833-12187" type="single"] Today's Video of the Day from NASA...

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Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> reveals the evolution of the Columbia Glacier in southeastern Alaska. Columbia is among the fastest shrinking glaciers in the world, and the video documents its rapid retreat over the years.&nbsp;



Columbia Glacier is a large, multi-branched calving glacier that flows out of the Chugach Mountains to the Prince William Sound.&nbsp;



According to USGS, Columbia had a long history of stability prior to 1980, with a length 41 miles, and small, short-lived advances or retreats.



In the years since 1980, however, satellite images have captured Columbia’s alarming retreat. By using false-color images, scientists can distinguish between snow and ice, open water, vegetation, and rocky debris on the glacier’s surface.



The series of false-color images featured in today's video were acquired over the span of 35 years. You can see that by 2021, the glacier’s main branch had retreated about 15 miles from its initial position.



The Columbia Glacier has also lost more than 50 percent of its volume, mostly due to calving. <a href="https://www.earth.com/video/nasa-reveals-3d-visual-of-an-atmospheric-river/">NASA</a> reports that while climate change likely started the retreat, mechanical processes kept the disintegration going.



The NASA images are provided by Jesse Allen, Robert Simmon, Joshua Stevens, and Lauren Dauphin using data from Landsat satellites, from the U.S. Geological Survey, and data from MODIS on NASA’s Terra satellite. The structure of Columbia’s moraine played a large role in the stability of the glacier before 1980. 



Like other tidewater glaciers, the Columbia built up a moraine over time, and the mixture of ice and rock functioned like a dam keeping out the sea. It was supported on one end by the shoreline and by the underwater terminal moraine at the other.



Video Credit: NASA Earth Observatory/&nbsp; NASA’s Scientific Visualization Studio



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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The rapid retreat of the Columbia Glacier

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes how record-breaking heat expressed itself around the world in 2022.



Scientists have determined that 2022 was the 5th warmest year since 1880. Furthermore, the last nine consecutive years have been the warmest on record.



From devastating floods and wildfires to natural disasters like Hurricane Ian, 2022 showed us yet again how a warming climate affects people across the globe.&nbsp;



"As we look back at 20:22 and years past, we see that each year we better understand the challenges we face and how important it is to meet them," says NASA.



Video/ Image Credit: NASA Goddard



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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2022 illustrated the consequences of a warming climate

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Satellites reveal how Earth's systems are interconnected Today’s Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes Earth’s interconnected systems, and how this network is affected by rising temperatures.&nbsp;



During 2020, average global temperatures matched the hottest year on record. The hurricane season was also record-breaking, with many of the storms intensifying at extraordinary speeds. Hot water in the ocean is fuel for hurricanes. The satellite data shows that it's all one interconnected system showing how Satellites reveal how Earth's systems are interconnected.



According to NASA, dust swept up from Northern Africa plays a major role in the formation of hurricanes, and is also a key source of fertilization in the Amazon rainforest. As a result of<a href="https://www.earth.com/news/seagrass-wasting-disease-is-fueled-by-climate-change/"> climate</a> change, dust plumes are expected to decline, which will have an effect on vegetation far away.&nbsp;



Images from Earth-observing satellites show how the world’s plant life is affected by natural disasters, fires, and deforestation. Satellites also reveal how widespread changes in vegetation impact waterways,&nbsp; the climate, air quality. Satellites communicate by using radio waves to send signals to the antennas on the Earth. "Earth From Space" is a groundbreaking two-hour special that reveals a spectacular new space-based vision of our planet. 



Video Credit: NASA Goddard&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Satellites reveal how Earth's systems are interconnected

[sendtonews key="JbW4VsY53O-1632195-12187" type="single"] Satellites reveal how Earth's systems are interconnected...

Today’s Video of the Day from the <a href="https://welcome.miami.edu/">University of Miami</a> Rosenstiel School of Marine and Atmospheric Science explores how changes in water temperatures have affected tiger shark habitats and movements in the North Atlantic Ocean. The study reveals that rising temperatures have caused the sharks to shift toward the poles over the past 40 years.



“Tiger shark annual migrations have expanded poleward, paralleling rising water temperatures,” explained study lead author Neil Hammerschlag. “These results have consequences for tiger shark conservation, since shifts in their movements outside of marine protected areas may leave them more vulnerable to commercial fishing.”



The researchers analyzed nine years of tracking data from satellite-tagged tiger sharks, combined with four decades of conventional tag and recapture data provided by National Oceanic and Atmospheric Administration (NOAA) Cooperative Shark Tagging Program.



The experts found that during the last decade of record heat, for every one-degree Celsius increase in water temperatures, tiger sharks migrated further poleward by over 400 kilometers. They also migrated two weeks earlier than usual to waters off the northeastern coast of the United States.



“Given their role as apex predators, these changes to tiger shark movements may alter predator-prey interactions, leading to ecological imbalances, and more frequent encounters with humans,” concluded Professor Hammerschlag.



Video Credit: University of Miami Rosenstiel School of Marine and Atmospheric Science



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Tiger sharks are shifting poleward as temperatures rise

Today’s Video of the Day from the University of Miami...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> is focused on the melt ponds that emerge during the spring and summer on the Greenland Ice Sheet, which is the largest ice mass in the northern hemisphere.



"Melt ponds are vast pools of open water that form on both sea ice and ice sheets and are visible as turquoise-blue pools of water in this Copernicus Sentinel-2 image," says ESA.



"When snow and ice melts atop glaciers, water flows in channels and streams and collects in depressions on the surface. These melt ponds can speed up the melting of the surrounding ice since they greatly reduce the ice’s ability to reflect sunlight."



"This can create a positive feedback where an increasing number of melt ponds absorb more heat which causes ice cover to melt even faster."



According to ESA, Greenland has been hit with a late-season heatwave that began in early September. This caused the type of melt event that usually occurs in the middle of summer.



"In a recent paper published in Nature Climate Change, scientists found that major sea-level rise from the melting of the Greenland ice cap is now ‘inevitable’ even if the burning of fossil fuels were to halt overnight," says ESA. "Using satellite observations of Greenland ice loss and ice cap from 2000 to 2019, the team found the losses will lead to a minimum rise of 27 cm regardless of climate change."



Video Credit: ESA&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Melt ponds on the Greenland Ice Sheet

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes how Earth is unique in our solar system for its ability to sustain liquid water on its surface. But now, the water cycle is shifting as the climate warms, and scientists must find ways to predict how these changes will affect water availability.



Overall, 96 percent of Earth's water is saltwater, and nearly all of freshwater is found in ice and groundwater. These sources of water are linked as it passes through solid, liquid and gas phases.



In a warmer climate, the water cycle will be transformed. It will be easier for water to evaporate and form clouds, and storms will become more frequent and intense. Some regions will get too much water, while others will be left without enough water. In addition, soil moisture will be lost - which threatens food security.



Scientists are using satellite data from over the last 40 years to track changes that are happening in the water cycle. This will ultimately help us prepare for extreme events and better manage our water resources, according to ESA.



Video Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Tracking changes in Earth's water cycle

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Saturn,-,High,Resolution,3d,Images,Presents,Planets,Of,The

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard Space Flight Center</a> features images of Saturn from NASA’s Hubble Space Telescope. The photographs capture the start of the mysterious "spoke season" on Saturn - when unexplained features appear on its rings. 



According to NASA, both the cause of the spokes and their seasonal variability have yet to be fully explained by planetary scientists.



"Like Earth, Saturn is tilted on its axis and therefore has four seasons, though because of Saturn's much larger orbit, each season lasts approximately seven Earth years. Equinox occurs when the rings are tilted edge-on to the Sun," explains NASA.



"The spokes disappear when it is near summer or winter solstice on Saturn. (When the Sun appears to reach either its highest or lowest latitude in the northern or southern hemisphere of a planet.) As the autumnal equinox of Saturn's northern hemisphere on May 6, 2025, draws near, the spokes are expected to become increasingly prominent and observable."



Experts believe that the spokes may be a product of the planet's variable magnetic field. When magnetic fields interact with solar wind, an electrically charged environment is created. This phenomenon is visible on Earth as the northern lights.&nbsp;



"Scientists think that the smallest, dust-sized icy ring particles can become charged as well, which temporarily levitates those particles above the rest of the larger icy particles and boulders in the rings," says NASA.



The spokes were first observed in the early 1980s by NASA's Voyager mission. Depending on the angle of the rings, the spokes can appear dark or light.



"Thanks to Hubble's OPAL program, which is building an archive of data on the outer solar system planets, we will have longer dedicated time to study Saturn’s spokes this season than ever before," said NASA senior planetary scientist Amy Simon, head of the Hubble Outer Planet Atmospheres Legacy (OPAL) program.



"Despite years of excellent observations by the Cassini mission, the precise beginning and duration of the spoke season is still unpredictable, rather like predicting the first storm during hurricane season."



Video Credit: NASA Goddard&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Mysterious "spoke season" captured on Saturn

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Closeup,Of,Fresh,Green,The,Napier,Bush,Grass,As,Animal

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Today’s Video of the Day from <a href="http://www.ntu.edu.sg/">NTU Singapore</a> reveals that some plants can remove toxic heavy metals from soil.&nbsp;



The researchers analyzed samples of various tropical plant species to test for levels of heavy metals and metalloids. The study showed that there are existing plants with high levels of these contaminants, which means that these species are great candidates for drawing pollutants out of the soil.&nbsp;



Among the plants examined in the study, 12 species had accumulated several types of heavy metals and metalloids. These plants are widely available, including species that are native to Singapore.



“In a small nation like Singapore, land may be repurposed to support new development plans, so it is important that we have a green and sustainable way to remediate land that is contaminated," said Professor Lam Yeng Ming.



"We set out to uncover how to better make use of tropical plants to do phytoremediation and through advanced characterization techniques, we showed how some of these tropical plant species can be an environmentally friendly and literally a 'green' way to remove contaminants in soil."&nbsp;



"Phytoremediation also has benefits of cost effectiveness, simplicity of management, aesthetic advantages, and long-term applicability and sustainability. The strategy prevents erosion and metal leaching by stabilizing or accumulating heavy metals, so that helps reduce the risk of contaminant spread.”



Video Credit: NTU Singapore



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Plants help remove heavy metals from contaminated soil

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Today’s Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> describes why herbicides are not as effective in killing weeds anymore. In the 20th century, chemical companies developed thousands of herbicides. The most commonly used herbicide was glyphosate, which was introduced in 1974.



Over the past few decades, dozens of species of weeds have evolved resistance to glyphosate. Depending on the site of action, the part of the plant that an herbicide interacts with, weeds may even be resistant to herbicides that have not been developed yet.&nbsp;



With increasing resistance to glyphosate and other herbicides, weeds are - once again - becoming a major concern for farmers.&nbsp;



Video Credit: American Chemical Society&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Weeds are becoming increasingly resistant to herbicides

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Today’s Video of the Day from the <a href="https://www.jpl.nasa.gov/">NASA Jet Propulsion Laboratory</a> (JPL) describes a dust storm on Mars that was nearly twice the size of the United States. As the storm covered the southern hemisphere of the planet, some of NASA’s explorers had to delay their normal activities.



NASA’s Insight lander put itself in a "safe mode" for 11 days to conserve battery power because solar power was disrupted by the dust. The Ingenuity Mars Helicopter postponed flights until conditions improved.



"A fleet of NASA orbiters monitor Martian dust storms like this one and serve as lifelines to Earth by relaying data from the rovers and lander on the ground back to the team. This includes the Mars Reconnaissance Orbiter, MAVEN, and Odyssey," reports JPL.



"Dust storms like this recent one start close to the ground and are spread by wind as they rise – warming the cold Martian atmosphere."



The images in the video were captured by NASA’s Curiosity as the dust rolled in. A fleet of orbiters monitored the dust storm from above, relaying data from Mars’ explorers back to scientists on Earth.



Video &amp; Image Credit: NASA/JPL-Caltech/ASU/MSSS



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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NASA monitors giant dust storms on Mars

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Today's Video of the Day from the <a href="http://www.esa.int/">European Space Agency</a> features Qeshm Island in the Strait of Hormuz. This strait provides the only sea passage from the Persian Gulf to the open ocean.



Qeshm is separated from the Iranian coast by the Clarence Strait, also known as Khuran.&nbsp;The Hara Forest Protected Area is a network of shallow waterways and forest located between the island and the mainland. This protected region is home to sea turtles, snakes, and more than 150 species of migrating birds.



Qeshm is famous for its wide range of&nbsp;ecotourist&nbsp;attractions, such as the&nbsp;Hara marine forests. According to environmentalists, about 1.5 percent of the world birds and 25 percent of Iran's native <a href="https://www.earth.com/news/female-hummingbirds-avoid-sexual-harassment-by-looking-like-males/">birds</a> annually migrate to the forests, which are the first national geo park in Iran.



Tourists are also drawn to the island to see an age-old Portuguese&nbsp;fort, historic mosques, the&nbsp;Seyyed Mozaffar&nbsp;and&nbsp;Bibi Maryam&nbsp;shrines, and the "Valley of Stars."



The average temperature on the island is 81 degress and the region is often hot and humid. From June to August, the island is described as being oppressively hot. The ideal time to visit is during the winter season. 



Video Credit: ESA&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Qeshm Island in the Strait of Hormuz

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Inhambane Bay in southeast Mozambique.&nbsp;



"Inhambane Bay is a deep inlet into which the small Mutamba River flows," says ESA. "On one side of the bay lies the historical city of Inhambane, capital of the Inhambane Province, while the sister city of Maxixe, the economic capital of Inhambane, sits across from it. The province is the second largest grower of cashews, after Nampula, and it also produces coconut and citrus fruits."



The beaches of Barra and Tofo are popular with tourists. There are also coral reefs along the long coastline of Inhambane, making it an ideal destination for scuba diving and snorkeling.



"Mozambique’s extensive coastline heightens the country’s vulnerability to tropical cyclones that develop in the Indian Ocean as well as storm surge flooding," says ESA.



"More than half of the population lives in low lying coastal areas, putting communities at risk. Inhambane Bay was dangerously close to where Cyclone Idai made landfall in 2019 causing widespread destruction to the country."



Video/ Image Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Inhambane Bay in southeast Mozambique

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency </a>&nbsp;features the Kangerlussuaq Glacier, one of the largest tidewater outlet glaciers in Greenland. The glacier is located on the east coast of the Greenland ice sheet.



As human-induced climate change continues to drive up temperatures, global ice loss is accelerating at an alarming rate. ESA reports that, over the past decade alone, 3.5 trillion tons of ice have melted from the Greenland ice sheet. This is enough to cover the UK with meltwater 15 meters deep.



Based on satellite imagery, researchers determined that Kangerlussuaq entered a new phase of rapid retreat and acceleration in 2017. In their study, published in <a href="https://www.frontiersin.org/articles/10.3389/feart.2019.00123/full">Frontiers in Earth Science</a>,&nbsp; the experts report that the glacier's ice front is now at its most retreated position since the early 20th century.



"Given Kangerlussuaq’s previous impacts on both the magnitude and pattern of ice sheet wide mass loss, we predict that its new phase of retreat, acceleration and thinning will markedly enhance the south-east region’s contribution to increasing discharge from the ice sheet," wrote the study authors.&nbsp;&nbsp;



"More broadly, accurate forecasting of the ice sheet’s contribution to sea level rise will require a deeper understanding of, and responses to, these non-linear ice dynamic processes."



Video Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Kangerlussuaq Glacier on the Greenland ice sheet

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes the complex relationship between ocean and climate. ESA's Climate Change Initiative will help us understand how oceans influence the climate and how climate change is impacting the oceans.&nbsp;



"Earth’s oceans are huge heat stores, soaking up 93% of the excess heat from human activity over the past 70 years. Ocean currents redistribute heat around the planet, from the Equator to the poles. Where this ocean heat goes influences weather patterns and regional climate," explains ESA.



"As well as absorbing heat, oceans are a natural carbon sink, absorbing a quarter of carbon dioxide emissions from human activity. This has led to the acidification of ocean water, threating marine life."



The amount of heat and carbon dioxide soaked up by the ocean depends on specific variables, including phytoplankton, temperatures, waves, salinity, and ice cover. Satellites can be used to measure these variables from space.



"From their unique vantage point, satellites provide key information for understanding the complexities of our planet and monitoring environmental issues," says ESA.



Video Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Ocean heat influences regional climate

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes the importance of monitoring the shape of the sea surface, which is constantly changing. These observations have many applications, such as ship routing, <a href="https://www.earth.com/news/the-modem-ocean-is-a-tough-place-for-whales-to-survive/">ocean</a> current forecasting, and debris tracking.



"A project supported by the Discovery element of ESA’s Basic Activities recently investigated a new technique to measure sea surface topography very precisely," reports ESA.



"The technique involves looking at satellite navigation (GNSS) signals that have been reflected off of the sea surface at very low angles. At these so-called grazing angles, waves and surface roughness have very little impact on the reflection process; the sea surface acts as a very smooth mirror."



Estel Cardellach is the principal investigator at the Institute for Space Studies of Catalonia, who first submitted the idea for the project.



“In a mirror-like reflection the phase of the signal can be tracked – it is continuous," said Cardellach. "Different surface heights result in different phase measurements. It gives a very precise measurement of the surface altitude at a few centimetres’ precision.”



The researchers developed a GNSS receiver and set up an experiment in the Balaeric Islands to collect signals from the receiver that were reflected off the sea surface. Ultimately, these signals will provide improved measurements of the shape of the sea surface.



Image/ Video Credit: ESA



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Monitoring the dynamic shape of the sea surface

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Aerial,Photo,Of,River,In,Amazon,Rainforest,Jungle,In,Peru

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Today’s Video of the Day from <a href="https://www.nasa.gov/goddard">NASA’s Goddard Space Flight Center</a> describes how scientists are using autonomous sound sensors to monitor deforestation in the Amazon. By recording soundscapes, the experts can determine which animals are present through their distinct sounds.&nbsp;



Using this method, sounds can be used as scientific measurements to analyze the effects of deforestation. The researchers will gain a better understanding of how the acoustics of a forest can be used to measure its health.&nbsp;



"From space, parts of the Amazon rainforest that have previously been logged or burned may look lush and green, like a place buzzing with activity and full of sounds. But inside the rainforest, the animal life may tell a different story, of a harsh environment and a quieter soundscape," says NASA.



Video Credit: NASA’s Goddard Space Flight Center&nbsp;



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Monitoring deforestation in the Amazon through sounds

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