The thin line of gold behind every tap, swipe, and click on our electronic devices rarely enters daily conversation, yet the metal keeps digital life running, then eventually turn into landfills full of toxic e-waste. 



From the contacts in a phone jack to the chips inside a smartwatch, gold moves electrons smoothly and shrugs off corrosion. 



Mining more, however, blasts mountains, drains rivers, and spews carbon. With the global appetite for electronics still climbing, attention has turned to the growing junkyard of cast‑off gadgets.



E‑waste is now the quickest‑rising waste stream on the planet - roughly 63 million short tons in 2024 according to <a href="https://www.unep.org/ietc/what-we-do/e-waste-management" target="_blank" rel="noreferrer noopener">United Nations estimates</a> - and only a small share gets recycled in certified facilities. 



Most of our old electronics end up in landfills or backyard workshops, which then leak metals into the groundwater, creating toxic brews. A cleaner strategy is to reclaim precious metals safely before our devices make their way into the garbage heaps.



<h2 class="wp-block-heading" id="h-cheese-e-waste-and-gold">Cheese, e-waste, and gold</h2>



A research team is now working to change that script. Professor Raffaele Mezzenga at <a href="https://ethz.ch/en.html" target="_blank" rel="noreferrer noopener">ETH Zurich</a> and senior scientist Mohammad Peydayesh assembled colleagues in search of a simpler tool than acid vats or cyanide baths. Their unlikely inspiration bubbles up in cheese factories.



Cheese makers separate <a href="https://www.earth.com/news/cottage-cheese-is-making-a-comeback-due-to-its-nutritional-benefits/" target="_blank" rel="noreferrer noopener">curds from whey</a>, leaving behind nearly nine pounds of watery by‑product for every pound of cheddar. Whey is rich in proteins that twist into hair‑thin amyloid fibrils when warmed in acid. 



The Zurich group realized those fibrils could be coaxed into a feather‑light sponge that prefers gold over the other metals lurking in <a href="https://www.earth.com/news/electronic-waste-is-growing-five-times-faster-than-recycling/" target="_blank" rel="noreferrer noopener">shredded phones and laptops</a>.



<h2 class="wp-block-heading" id="h-adding-a-cheesy-twist-to-golden-e-waste">Adding a cheesy twist to golden e-waste</h2>



The researchers stirred the fibrils into a gel, then dried it into an aerogel - think Styrofoam’s airiness on a nanoscale. Microscopic pores criss‑cross the material, offering miles of surface area inside a crumb‑sized cube. 



When a slice of this sponge meets a beaker filled with dissolved circuit boards, gold ions rush toward the proteins and cling tightly.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/05/electronic-devices_gold-extraction-process_schematic_credit-ETH-Zurich_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/05/electronic-devices_gold-extraction-process_schematic_credit-ETH-Zurich_1s.webp" alt="Schematic route followed to generate neat value via pure gold, extracted from food waste (whey) and e-waste as starting source materials. Credit: Advanced Materials" class="wp-image-1968796"/></a><figcaption class="wp-element-caption">Schematic route followed to generate neat value via pure gold, extracted from food waste (whey) and e-waste as starting source materials. Click image to enlarge. Credit: Advanced Materials</figcaption></figure>



Early trials showed the aerogel collecting a far higher share of gold than plastic resins that recyclers often use. Better yet, the process skips noxious solvents. 



Water, moderate heat, and the natural chemistry of protein do the heavy lifting, which slashes both hazard and cost.



<h2 class="wp-block-heading" id="h-aerogel-and-a-protein-sponge">Aerogel and a protein sponge</h2>



For a head‑to‑head laboratory test, the team stripped metal parts from twenty <a href="https://www.earth.com/news/international-day-of-zero-waste-a-global-commitment-to-a-sustainable-future/" target="_blank" rel="noreferrer noopener">discarded computer motherboards</a>, dissolved them in acid, and dropped in a fingernail‑sized piece of aerogel. 



Copper, nickel, and cobalt swirled in the brew, yet gold ions settled on the sponge far more efficiently. After a short soak, the solution cleared, signaling that most of the precious metal had left the liquid.



Numbers tell the story. The sponge drew out gold that was about 90.8 percent pure - close to 22‑karat jewelry - on its first pass. Competing adsorbents usually require extra purification steps to reach similar purity.



<h2 class="wp-block-heading" id="h-from-e-waste-ions-to-gold-nuggets">From e-waste ions to gold nuggets</h2>



Pulling ions from solution is useful; turning them back into solid metal is crucial. The Zurich group warmed the loaded sponge until the <a href="https://www.earth.com/news/fools-gold-may-be-a-valuable-source-of-lithium/" target="_blank" rel="noreferrer noopener">gold ions</a> shed their charge and merged into shimmering flakes. 



Heating continued until the flakes fused into a nugget weighing roughly 450 milligrams. Chemical analysis showed the lump was 91 percent gold and 9 percent copper, again hitting the mark for 22 carats.



This step also freed the protein skeleton. Burned away under controlled heat, the whey‑derived matrix leaves no synthetic residue, easing cleanup. Conventional resin beds cannot claim the same neat exit.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2025/05/electronic-devices_gold-extraction-process_gold-nuggets-recovered_Credit-ETH-Zurich_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2025/05/electronic-devices_gold-extraction-process_gold-nuggets-recovered_Credit-ETH-Zurich_1s.webp" alt="The gold nugget obtained from computer motherboards in three parts. The largest of these parts is around five millimeters wide. Credit: ETH Zurich/Alan Kovacevic" class="wp-image-1968794"/></a><figcaption class="wp-element-caption">The gold nugget obtained from computer motherboards in three parts. The largest of these parts is around five millimeters wide. Click image to enlarge. Credit: ETH Zurich/Alan Kovacevic</figcaption></figure>



Recycling lives or dies on the balance sheet. Here the math looks encouraging. 



Procurement and energy costs for the entire operation are about fifty times lower than the market value of the gold retrieved. Even after accounting for labor and overhead, that margin hints at solid profit for commercial recyclers.



Lower operating costs open doors for smaller regional plants. Instead of shipping obsolete electronics overseas, communities could process them nearby, cutting transportation emissions and keeping revenue local.



<h2 class="wp-block-heading" id="h-e-waste-has-more-than-just-gold">e-Waste has more than just gold</h2>



Gold steals headlines, yet the technique need not stop there. By tweaking pH or tailoring the protein structure, the same sort of sponge could sort copper, cobalt, or <a href="https://www.earth.com/news/water-captured-on-video-forming-out-of-thin-air-for-the-first-time/" target="_blank" rel="noreferrer noopener">palladium</a> - metals vital for batteries and sensors. 



The team is already experimenting with pea‑protein waste from plant‑based milk production and collagen from fish scales. Success would guard against supply bottlenecks tied to a single dairy stream.



E‑waste is not the only target. Industrial rinse water from <a href="https://www.earth.com/news/quantum-computer-defeats-a-supercomputer-in-crucial-annealing-optimization-task/" target="_blank" rel="noreferrer noopener">microchip fabrication</a> and gold‑plating shops also carries trace metals worth reclaiming. A modular protein sponge could slip into those lines, trimming costs and curbing runoff.



<h2 class="wp-block-heading" id="h-taking-the-next-steps">Taking the next steps</h2>



“The fact I love the most is that we’re using a food industry byproduct to obtain gold from electronic waste,” Mezzenga says. In a very real sense, the method transforms two waste products into gold. “You can’t get much more sustainable than that!”



If pilot projects scale as hoped, tomorrow’s recycling centers may sit beside creameries and food processors, quietly turning yesterday’s whey and last decade’s gadgets into tomorrow’s circuit traces. 



The approach will not halt mining overnight, but every recovered ounce delays a blast, a slurry pond, or a diesel haul truck. 



That shift, multiplied across millions of phones and laptops, offers a straightforward path toward lighter footprints and longer‑lived resources - no new mountains required.



The full study was published in the journal <a href="https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.202310642" target="_blank" rel="noreferrer noopener">Advanced Materials</a>.



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Invention turns our electronic waste into 22-carat gold nuggets instead of toxic trash

The thin line of gold behind every tap, swipe, and click on our electronic devices rarely enters daily conversation, yet the metal keeps digital life running, then eventually turn into landfills full of toxic e-waste. From the contacts in a phone jack to the chips inside a smartwatch, gold moves electrons smoothly and shrugs off corrosion. Mining more, however, blasts mountains, drains rivers, and spews carbon. With the global appetite for electronics still climbing, attention has turned to the growing junkyard of cast‑off gadgets. E‑waste is now...

Cities are beginning to turn to <a href="https://www.earth.com/news/easy-ways-adopt-zero-waste-mindset/">composting</a> as another means of keeping waste out of landfills, which also creates a nutrient-rich material that can be used for farming.

Composting comes with many benefits, but now new research has found that composting can lead people to make more eco-conscious decisions in their day to day lives. 

The study was led by Nicole Sintov, an Assistant Professor of Behavior, Decision-making and Sustainability at the <a href="https://www.osu.edu/">Ohio State University</a>. 

Sintov was interested to see if the adoption of a composting program would encourage area residents to make other smart “green” decisions” as part of something called “spillover.” 

Spillover is a concept where one behavior leads to another, either with positive or negative chain effects. For example, someone who decides to eat a salad for lunch might overcompensate for dinner. 

Sintov wanted to explore how spillover would apply to residents of Costa Mesa, California who in 2015 were given the option of curbside recycling and compost. 

“The idea is if you're investing all these resources - composting bins and trucks and new facilities - is it possible that this could lead to any other pro-environment behavior, or do people start to slack off in other areas, which we don't want,” said Sintov. 

The study included 284 Costa Mesa residents who were asked about three food-waste prevention behaviors and seven energy and water-waste behaviors, such as unplugging electronics and taking shorter showers. 

The results showed an increase in water and energy conservation behaviors that correlated with the start of the composting program. Composting was a catalyst that motivated other eco-friendly decisions. 

The researchers were happy to see that the spillover was largely positive. 

Sintov and her colleagues found that because those people that composted were actively engaged in waste disposal, they were more consciousness of waste in other aspects of their lives. 

“Our study found that this happened because waste was on their minds, or 'cognitively accessible,' and this thinking about waste seems to lead you to manage waste in other ways,” said Sintov. 

The study does not represent a wide range of residents, as the participants for the study all came from one affluent and well-educated community. The researchers note that further studies will need to be done to see if the results are duplicated in different communities and populations. 

Even with this in mind, the results present convincing evidence that composting programs have added eco-friendly benefits beyond reducing waste in landfills. 

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>,<a href="https://www.earth.com/"> Earth.com</a> Staff Writer

Composting leads to more eco-friendly decisions

Cities are beginning to turn to composting as another means...

Cancer becomes an ever increasing risk as we age, and the association of old age with many cancer types has been well established. But scientists have also noticed that cancer incidence is increasing globally, and certain geographical populations seem to be at higher risk than others. Populations living in very low temperatures, such as Denmark and Norway, have some of the highest incidences of cancer in the world.

A recent paper published in the journal <a href="https://academic.oup.com/mbe">Molecular Biology and Evolution</a> has proposed a new hypothesis for this phenomenon: there is an evolutionary relationship between adaptation at extreme environmental conditions and increased cancer risk. 

“The findings of this study provide evidence that genetic variants found to be beneficial in extreme environments, can also predispose for cancer,” says Kostantinos Voskarides of the <a href="https://www.ucy.ac.cy/medical/en/">University of Cyprus Medical School</a>.

In his research, Voskarides focused on the effect of low temperatures at either high altitudes or in Arctic/Scandinavian climates. He used the GLOBOCAN-2012 database – the most accurate and reliable datasource for worldwide cancer incidence – and analyzed genetic clues in 247 different cancer genome-wide association studies. Voskarides also looked through the available literature’s bibliographic cancer incidence and genetic data for human populations in extreme cold and at very high altitudes.

The results showed a clear pattern, with the highest incidence of certain cancers linked to populations living in the coldest environments. 

“These data show that these populations exhibit extremely high cancer incidence, especially for lung, breast and colorectal cancer,” explained Voskarides.

Genetic evidence also showed that genes that are under selection to populations in order to survive in extreme conditions are also predisposed for cancer. The highest cancer associations with genes under selection were found to be colorectal cancer for Native Americans and Siberian Eskimos, esophageal cancer and lung cancer for Siberain Eskimos, leukemia for Oromi (a high-altitude population in Ethiopia) and a number of cancers for high-altitude dwelling Andeans-Tibetans.

“Evidence was found that cancer rates have been increased in those populations through natural selection procedures,” says Voskarides. “This is the first study that provides evidence that high cancer risk may be a result of evolutionary adaptation in certain environmental conditions.”

The ultimate conclusion of this study was that populations that are isolated in extreme environments also face extreme <a href="https://www.earth.com/news/cancer-cases-modifiable-risk-factors/">cancer</a> risk. Further research will help better understand the key adaptive forces that may be behind cancer epidemiology.

[caption id="attachment_967257" align="aligncenter" width="279"]<a href="https://www.earth.com/wp-content/uploads/2017/12/cold-temperatures.jpg"><img class="size-medium wp-image-967257" src="https://www.earth.com/wp-content/uploads/2017/12/cold-temperatures-279x300.jpg" alt="" width="279" height="300" /></a> Image Credit: Konstantinos Voskarides, University of Cyprus Medical School[/caption]

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Extremely cold environments may increase risk of cancer

Cancer becomes an ever increasing risk as we age, and...

Fast-moving wildfires are raging across southern California, forcing the evacuation of tens of thousands of people. The Thomas Fire in Ventura County, which broke out on Monday and now covers at least 65,000 acres, is by far the largest. Over 150 buildings have been destroyed and 12,000 additional structures are currently threatened in Ventura alone.

In Los Angeles County, two separate fires ignited on Tuesday. North of downtown <a href="https://www.earth.com/news/watering-lawns-lost-gallons-water/">Los Angeles</a>, the Creek Fire burned 11,000 acres by Tuesday night, and the Rye Fire scorched 7,000 acres. 

A third fire, the Skirball Fire, erupted this morning near the Getty Center as a brush fire. This latest blaze has prompted evacuations from the Bel Air area and shut down portions of Interstate 405 because the fire is burning so close to the highway.

California Governor Jerry Brown has declared a state of emergency in both Ventura and Los Angeles counties, and is urging residents to be ready to evacuate and to “evacuate immediately if told to do so.”

Officials are warning that the fires could threaten the region for days. Los Angeles police chief Charlie Beck referred to the fires as “a multi day event,” and suggested that more fires are likely. 

The National Weather Service warned that the combination of low humidity and strong winds could lead to “very rapid fire growth” and “extreme fire behavior.”

Chief Ralph M. Terrazas of the Los Angeles Fire Department said earlier today that wind conditions are favorable at this time but warned that could change. Santa Ana winds are projected to reach 80 miles per hour on Thursday.

Just two months ago, Northern California experienced the worst series of wildfires in the state’s history, which killed 44 people and burned 8,700 structures.

--

By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Image Credit: Alex Avlas

Wildfires explode across Southern California

Fast-moving wildfires are raging across southern California, forcing the evacuation...

Experts from the UK and the United States are outlining the best investments in clean energy based on their analysis of recent research and innovation. The authors of the paper recommend that governments give technical experts more control of <a href="https://www.earth.com/news/green-solar-panels-appealing/">clean energy</a> programs in order to achieve more long-term stability.

The researchers have drafted six "guiding principles,” and are encouraging the support of programs that have staying power rather than just “ quick win” potential. Among the principles proposed by the research team are to adopt an adaptive learning strategy and to keep clean energy research funding predictable and stable.

"As the window of opportunity to avert dangerous climate change narrows, we urgently need to take stock of policy initiatives around the world that aim to accelerate new energy technologies and stem greenhouse gas emissions," says Laura Diaz Anadon, Professor of Climate Change Policy at the <a href="https://www.cam.ac.uk/">University of Cambridge</a>.

The authors are urging policymakers to learn what works from experience and build on it before time runs out. The experts say that some government officials are constantly reinventing clean energy goals and targets for the sake of political vanity.

"If we don't build on the lessons from previous policy successes and failures to understand what works and why, we risk wasting time and money in a way that we simply can't afford," says Anadon.

Public investments in energy research have steadily risen in recent years. For example, funding for new energy research and development by the Organization for Economic Cooperation and Development (OECD) jumped to $16.6 billion in 2016 compared to $10 billion in 2010. In addition, the EU and other nations pledged to double clean energy investment as part of Paris Climate Change Agreement.

Regardless, the study authors point out that government funding for energy innovation has become highly volatile in the recent past. Political shifts in the UK and the U.S. have resulted in huge budget fluctuations and process reinventions.

The research team found, for example, that one in five technology areas funded by the U.S. Department of Energy experienced a budget shift of more than 30 percent up or down every single year from 1990 to 2017. In 2018, the Trump administration plans to cut the energy research and development budget by 35 percent across the board.

In the UK, every Prime Minister since 2000 has created new institutions to manage energy innovation. 

"Experimentation has benefits, but also costs," explains Anadon. "Researchers are having to relearn new processes, people and programs with every political transition - wasting time and effort for scientists, companies and policymakers."

"Rather than repeated overhauls, existing programs should be continuously evaluated and updated. New programs should only be set up if they fill needs not currently met."

The research is published in the journal <a href="https://www.nature.com/nature/">Nature</a>.

--

By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Experts advise governments on effective clean energy strategy

Experts from the UK and the United States are outlining...

As climate change is projected to increase the frequency of severe ice storms, concerns are growing about how forest health will be impacted. Ecologist Lindsey Rustad of the <a href="https://www.fs.fed.us/">USDA Forest Service</a> set out to closely examine how ice storms affect the forest.

It is well-known that <a href="https://www.earth.com/video/artificial-ice-storms-severe-weather/">ice storms</a> can cause damage to communities as large frozen tree limbs can take down power lines and crash into houses, but the long-term damage that ice storms cause to the forest itself is relatively unknown.

Rustad teamed up with New England scientists to simulate an ice storm at the 8,000-acre USDA Forest Service Hubbard Brook Experimental Forest in New Hampshire. The researchers used fire hoses to pump water from a creek over different sections of the forest. 

"It's not easy to study ice storms because they're difficult to predict," explained Rustad. "We didn't want to become storm chasers, so we decided to make our own."

Using various amounts of water, the team created a light icing with a quarter-inch of ice,  a significant icing of a half-inch of ice, and an extreme icing with three-fourths of an inch of ice.

The team will compare the frozen sections of forest to nearby forest area that has not been disturbed. They plan to focus their comparison on forest health indicators including soil nutrient cycling, forest regrowth, and wildlife. The research will contribute to an ongoing decades-long investigation on how a severe ice storm in 1998 affected the northeastern United States and Canada.

Although the project will not be completed until next year, Rustad has some predictions about what her team will discover. She explained that a light icing can be good for forests by thinning out branches and making room for new growth.

"Trees have a certain amount of stored carbon," she says. "With one icing, they have enough reserves to re-foliate and recover."

Severe icing events back to back like scientists have predicted to occur with climate change, however, can be devastating to a forest's carbon reserves. Despite this, Rustad still remains optimistic about the outcome.

"Our forests are tremendously resilient," said Rustad. "I grew up in the days of acid rain. So scientists embarked on a couple decades of exhaustive research and we passed the Clean Air Act, and reduced sulfur emissions by 80%."

During their research, the experts will develop a more accurate climate prediction model that will incorporate extreme ice events. They will also examine the forest health indicators, and hope to innovate new methods of warning the public about upcoming ice storms.

Rustad presented preliminary details of the research project at the October Annual Meeting of the <a href="https://www.agronomy.org/">American Society of Agronomy</a>, Crop Science Society of America, and Soil Science Society of America in Tampa, Florida.

--

By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

&nbsp;

Climate change could increase the frequency of severe ice storms

As climate change is projected to increase the frequency of...

Scientists are warning that <a href="https://www.earth.com/news/heavy-air-pollution-nuclear/">air pollution</a> in London is negatively impacting the health of unborn infants. The experts have determined that exposure to pollution generated by vehicles is associated with an increased risk of low birth weight babies born at full term.

While previous research has linked air pollution with complications in pregnancy, similar studies investigating the potential effects of noise pollution have been inconclusive.  

Researchers led by the <a href="https://www.imperial.ac.uk/">Imperial College London</a> set out to examine the outcomes of exposure to air pollution and noise pollution from road traffic during pregnancy. They focused their study on two potential birth weights, low birth weight and being born small for gestational age.

The research team used national birth registers to identify over 540,000 full-term births in the London area between 2006 and 2010. The experts estimated the average monthly concentrations of traffic-related air pollution at the home addresses of the mothers. They also estimated the average levels of noise pollution during daytime and nighttime hours.

Next, the researchers used statistical models to analyze the data. The study revealed that air pollutants from road traffic, particularly PM2.5, were associated with a 2 to 6 percent increase in the risk of low birth weight and a 1 to 3 percent increase in the risk of being small for gestational age.

There was no significant link found between noise pollution and complications at birth, yet the researchers reported that they "cannot rule out that an association might be observed in a study area with a wider range of noise exposures."

"Our findings suggest that air pollution from road traffic in London is adversely affecting fetal growth," said the study authors. They emphasized that reducing London's annual average PM2.5 concentration by 10 percent would prevent an estimated 90 babies being born with low birth weight at full term each year in London.

"With the annual number of births projected to continue increasing in London, the absolute health burden will increase at the population level, unless air quality in London improves," said the researchers. 

While the authors said that the findings of the study "should increase awareness that prenatal exposure to small particle air pollution is detrimental to the unborn child," they also stressed the fact that increasing awareness without solutions for risk reduction "may serve only to increase maternal anxiety and guilt."

The research, which is published by <a href="http://www.bmj.com/">The BMJ</a>, is applicable to other UK and European cities as well. The experts are urging for environmental health policies to improve air quality in urban areas.

--

By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Traffic air pollution impacts the health of unborn babies

Scientists are warning that air pollution in London is negatively...

California trees are not just helpful in increasing property value, but also help to clear the air of carbon dioxide and other pollutants. The ecosystem services provided by California’s 173.2 million city trees are valued at $8.3 billion per year. Despite all of these benefits, a new study reveals that California has the lowest canopy cover per capita in the country.

The researchers found that <a href="https://www.earth.com/news/california-psychedelic-mushrooms/">California</a> has 109 square yards of city tree canopy per person, which falls way behind the states with the best numbers such as New Hampshire with 1,514 square yards of tree canopy per person or Alabama with 1,182 square yards of tree cover per person.

Greg McPherson is a research forester with the U.S. Forest Service’s <a href="https://www.fs.fed.us/psw/">Pacific Southwest Research Station</a> and the lead author of the study.

"There's no question that Californians are deriving significant benefits from their urban forests," said McPherson. "However, the fact remains that more can be done and will need to be done in light of the recent tree mortality epidemics plaguing some of our urban forests."

Thousands of trees have been killed in southern California by the invasive shot hole borer. This beetle invades while carrying fungal spores that infect and kill trees, and poses a threat to 33 percent of the urban tree population in the region. Over 50 tree species in southern California are reproductive hosts for the insect, making them vulnerable to its lethal fungus.

Study co-author Natalie van Doorn, a research urban ecologist with the Pacific Southwest Research Station, explained that the state’s population and summer climate are also likely contributors to California’s tree canopy ranking.

"One of the factors driving the low per capita rating for California city trees could be the fact that 20 of the nation's 100 most densely populated cities are in California, meaning there's a higher volume of people in a confined space for trees," said van Doorn. "California's arid summer climate also can suppress tree establishment and growth, which also could be a contributing factor for the results we observed."

Van Doorn pointed out that there are about 236 million vacant tree sites within these California cities, and so there is abundance of space for new trees to be planted.

"In fact, our study results are already being used by municipal and state agencies to identify priority areas for planting and tree conservation, as well as examining potential disparities in disadvantaged communities," she said.

The study, which is entitled "The structure, function and value of urban forests in California communities," is published online in <a href="https://www.journals.elsevier.com/urban-forestry-and-urban-greening">Urban Forestry and Urban Greening</a>.

--

By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Image Credit: US Forest Service

California has lowest tree cover per capita in the country

California trees are not just helpful in increasing property value,...

Science has proven that it’s crucial for <a href="https://www.earth.com/news/reaction-time-predict-mortality/">seniors</a> to stay active as they get older. But what happens when the environment you’re exercising in is toxic enough to counter those health benefits? In cities with heavy air pollution, this may very well be the case.

A new study conducted by scientists from <a href="https://www.imperial.ac.uk/">Imperial College London</a> and<a href="https://www.duke.edu/"> Duke University</a> found that adults over 60 lost all benefits of walking for two hours when subjected to short-term exposure to traffic exhaust and street pollution.

The study was published in the journal The Lancet and is the first study of its kind to look at exposure to pollution canceling out the benefit of exercise on both healthy patients and those with cardiorespiratory illnesses like coronary heart disease.

The research found that that exposure to busy city streets and traffic pollution countered the the positive effects of moderate exercise like walking, but that walking in parks significantly improved health and wellbeing.

“Combined with evidence from other recent studies, our findings underscore that we can't really tolerate the levels of air pollution that we currently find on our busy streets," said Fan Chung, Professor of Respiratory Medicine and Head of Experimental Studies in Medicine at the<a href="https://www.imperial.ac.uk/nhli"> National Heart &amp; Lung Institute at Imperial College</a>. “We call for greater access to urban green spaces for people to exercise.”

For the study, the researchers asked 119 volunteers over 60 years old who were either healthy or had a preexisting cardiorespiratory condition to walk for two hours during the day.

The participants either walked in Hyde Park in London or a busy section of Oxford Street. Pollution levels in Oxford Street often exceed air quality limits set by the <a href="http://www.who.int/">World Health Organization</a>.

The researchers took physical measurements before and after the walks so they could see how the exercise impacted the participants’ blood pressure, lung capacity, and arterial stiffness.

The study volunteers who walked in Hyde Park showed significant improvement in lung capacity within the first hour and the effects lasted even after the walk was completed. 

Walking along Oxford Street had a small impact on lung capacity, but it didn’t match nearly those that were in Hyde Park.

Healthy participants experienced a 24 percent reduction in arterial stiffness, and patients with preexisting conditions saw a 19 percent reduction when walking in Hyde Park. Those who walked on Oxford Street experienced much smaller reductions in arterial stiffness. 

Even when accounting for the stress-inducing environment of crowded Oxford Street, and the medications that some of the participants took, the results show the lasting positive effects that walking in non-polluted areas has on respiratory health. 

The study also highlights the importance of urban green spaces and reducing pollution in major cities. 

--

By<a href="mailto:kayvandette@gmail.com"> Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com </a>Staff Writer

Air pollution cancels positive benefits of exercise for seniors

Science has proven that it’s crucial for seniors to stay active...

When President Donald Trump announced that the United States would withdraw from the Paris Climate Accord, the landmark agreement between 200 countries to reduce greenhouse gas emissions, it sparked <a href="https://www.earth.com/news/group-challenges-paris-withdrawal/">outrage</a> both nationwide and across the globe. 

Environmentalists, climatologists, policy makers, U.S. residents, and international leaders all chimed in on their disapproval of the President’s decision and his unwillingness to accept the realities of climate change. 

At the moment, the United States is the only country that’s not part of the agreement, but there’s still hope for America’s future in reducing carbon emissions. 

Cities are now taking matters into their own hands to address the growing concerns of climate change and greenhouse gas emissions. 

Now, a new endeavor called the Chicago Charter is an agreement among at least 36 U.S cities to do their part to meet the same goals as the Paris Accord. 

The Chicago Charter will be signed by the participating U.S city mayors at the <a href="http://www.c40.org/events/north-american-climate-summit">North American Climate Summit</a> in Chicago. 

Not only does the charter outline plans to reduce emissions but also, similar to the Paris Accord, it requires all involved to be held accountable in sharing its progress with the public. 

<a href="http://climatemayors.org/">Climate Mayors</a>, a similar organization that was started after the President’s decisions to withdraw the US from the Paris Accord, has over 380 mayors who have promised to reduce carbon emissions in their cities, and who combined represent 68 million U.S residents. 

Both Climate Mayors and the Chicago Charter prove the dedication that many have to reduce greenhouse gas emissions and combat climate change, despite the current administration’s views. 

Some of the major cities involved include Salt Lake City, which aims to have 100 percent of its electricity supplied through renewable energy by 20332. Washington D.C looks to have renewable energy make up 50 percent of the city's power needs by 2032, and Chicago plans to undergo a major transformation in its public transit system.  

The Chicago Charter marks another exciting endeavor and important step in reducing greenhouse gas emissions in the United States. 

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By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com </a>Staff Writer

U.S. mayors pledge to sign their own climate agreement

When President Donald Trump announced that the United States would...

Already-endangered tigers in the Sumatran jungle could face steep population declines if their jungle habitats undergo any more deforestation, according to new research. 

Even though tigers in Sumatra had revived their populations over the last two decades thanks to anti-poaching efforts, their habitats are now decreasing and becoming more and more fragmented. 

17 percent of the Sumatran jungle forests were cleared between 2000 and 2012. <a href="https://www.earth.com/news/remote-sensing-oil-palm-industry/">Oil palm</a> plantations are the biggest culprit for logging and habitat degradation in the area. 

A new study, published in the journal Nature, followed and tracked endangered tigers in Sumatra for a year. 

The team, led by Matthew Luskin, a research fellow with the <a href="https://www.si.edu/">Smithsonian Institution</a>, spent a year in remote jungle forests and mounted cameras that would take videos and pictures. 

After compiling all of the footage, the researchers were able to calculate the Sumatran Tiger’s home range, which is approximately 150 square miles. 

This is especially challenging because it means the tigers need large protected reserves to thrive. 

“The loss of key habitat is causing significant conservation challenges for Sumatra -- and in particular for this critically endangered species,” said Luskin. 

The researchers also discovered that tiger populations are 47 percent denser in forests that have not been degraded or logged. The degraded forests have caused Sumatran tiger populations to become more scattered and splintered. 

The results of the study show that there now remain only two areas large enough to support more than 30 breeding females, which is what is necessary for the continued survival of the species. 

According to Luskin, reforestation of Sumatra’s jungle forests is unlikely and protecting what little remains of the endangered tigers’ habitats should be a priority. 

“Safeguarding the remaining expanses of primary forests is now absolutely critical to ensuring tigers can persist indefinitely on Sumatra,” said Mathias Tobler, the study’s co-author.

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By<a href="mailto:kayvandette@gmail.com"> Kay Vandette</a>,<a href="https://www.earth.com/"> Earth.com</a> Staff Writer

Image Credit: Matthew Luskin

Sumatran tigers struggle in fragmented forests

Already-endangered tigers in the Sumatran jungle could face steep population...

As Europe prepares for a shift toward hybrid and electric vehicles, new issues arise because these vehicles are considered to be too quiet for hearing-impaired pedestrians. The European Union has mandated that low-emissions vehicles be equipped with acoustic vehicle alerting systems, which will lead to a major increase in traffic noise.

<a href="https://www.earth.com/news/human-noise-pollution-fish/">Noise pollution</a> is an environmental issue which is often overlooked that causes negative health and economic impacts. Road traffic, railways, and air traffic all contribute to the growing amount of noise pollution in densely populated areas.

René Weinandy, head of Noise Abatement in Transport for the German Environment Agency, was shocked to learn that the European Union had drafted regulations to utilize speakers which continuously emit sound during vehicle operation. 

Weinandy explained that the plans to arm electric vehicles with acoustic vehicle alerting systems "are already being cast into laws both in the U.S. and Europe - without adequate scientific proof of their effectiveness or adequate consideration of their negative side effects.” He added that, “Less harmful alternatives haven't been systematically sought or explored. Clearly, there must be better alternatives."

Weinandy developed a study to assess the effectiveness of acoustic vehicle alerting systems, their downsides, and potential non acoustic alternatives.

"In Germany alone, an estimated 4,000 people die every year from noise-triggered heart attacks -- more than are killed in traffic accidents," said Weinandy. "So is it really a wise decision to increase the noticeability of electric vehicles in traffic by making them spew noise pollution?"

Weinandy said that the noise released by the acoustic vehicle alerting system is "a synthetic, increasing sound that's supposed to be similar to an internal combustion engine vehicle start-up.”

Weinandy and his team are currently exploring the development of non acoustic strategies while accounting for environmental protection, road safety, feasibility, and usability. They have a goal of reducing noise pollution and making traffic as quiet as possible.

"We're working to change the mindset of the general public: while noise may be simply a nuisance in some situations, it acts as a potent environmental poison in others and should be treated as such," said Weinandy. "Noise does its harmful job - often without the conscious perception of the people being exposed to it."

Weinandy will present his team's work during the 174th Meeting of the <a href="http://acousticalsociety.org/">Acoustical Society of America</a>, being held this week in New Orleans, Louisiana. 

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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

Electric cars temper noise pollution but may be dangerously quiet

As Europe prepares for a shift toward hybrid and electric...

While the current conditions of transportation and water infrastructure funding in the United States are not as critical as what is widely perceived, a new study has found that priority shifts and policy changes are needed on a local, state, and federal level for more effective spending.

Research from the <a href="https://www.rand.org/">RAND Corporation</a> has revealed that just a 2.5 to 3 percent annual spending increase above the $235 billion which is currently spent on transportation and water infrastructure could eliminate existing maintenance backlogs by 2030.

According to the study, a national consensus on capital spending priorities is needed to target strategies to meet 21st century needs, while also taking into consideration the varying needs of <a href="https://www.earth.com/news/trees-grow-faster-cities/">urban</a> and rural areas.

State and local governments are primarily responsible for building and maintaining infrastructure such as highways, bridges, water and sewage treatment, airports and ports. The RAND study suggests that these state projects need federal support through tax advantaged financing, efficiency improvements in regulatory processes, and research and development.

"Spreading federal dollars around to fund short-term, 'shovel-ready' projects without a sense of national purpose or priority will not get the nation where it needs to be," said study lead author Debra Knopman. "The federal government should focus on maintaining and modernizing vital federal infrastructure and on targeting nationally significant projects that are beyond the capacity of individual states and cities."

Federal assistance could be provided through direct spending or through the tax code. The researchers recommend for Congress to preserve the federal tax exemption on interest earned from municipal bonds for at least the next ten years, reinstate taxable Build America Bonds, and experiment with other financing alternatives that keep capital flowing so that state and local agencies have sustained and reliable capital for building projects.

RAND researchers also suggest investing in advanced technologies to support newer construction methods that would utilize more durable and sustainable materials and sensor technologies to benefit maintenance. Furthermore, the researchers say that federal funding should require projects to focus on resilience to natural disasters and climate change in order to reduce the need for additional spending in the future.

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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

Smarter spending key to improving U.S. infrastructure

While the current conditions of transportation and water infrastructure funding...

Scientists are transforming chocolate into a functional food by infusing it with probiotics and prebiotics, aiming to create a treat that satisfies cravings while supporting gut health. 



The challenge lies in maintaining chocolate's beloved texture and flavor while adding health benefits.



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Probiotics - beneficial microbes that balance gut bacteria and aid digestion - are typically fragile and can be destroyed by stomach acid or processing. 



Prebiotics act as food for these microbes, helping them thrive. Together, they form "synbiotics," a powerful health combination.



Researchers Smriti Gaur and Shubhi Singh from India's Jaypee Institute of Information Technology took an innovative approach, using natural prebiotics like corn and honey instead of complex processing methods. 



They created five chocolate varieties: a control and four synbiotic versions containing different combinations of prebiotics, probiotics (Lactobacillus strains), and flavor enhancers (cinnamon or orange).



Laboratory simulations of human digestion showed the probiotics remained viable for over five hours, suggesting they could survive long enough to benefit gut health.



Taste tests were positive, with researchers particularly enjoying the orange-flavored variety, describing it as having "vibrant citrus notes" complementing the "rich cocoa" with a "luxurious" texture.



This research represents just the beginning. With further refinement of strains, textures, and flavors, chocolate could evolve beyond mere indulgence to become a functional food that nourishes while it delights.



The study is published in the journal <a href="https://pubs.acs.org/doi/10.1021/acsfoodscitech.4c00741" target="_blank" rel="noreferrer noopener">ACS Food Science &amp; Technology</a>.

Is chocolate the next nutritional powerhouse?

Scientists are transforming chocolate into a functional food by infusing...

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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



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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"

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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

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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



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.

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



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.

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



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.

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



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.

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



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.

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



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.

Tracking changes in Earth's water cycle

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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



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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



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.

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



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.

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



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.

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



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.

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



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.

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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