<p>Today's <strong>Image of the Day</strong> from <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA Earth Observatory</a> features a wall of dust moving across the Korean Peninsula on April 25, 2024.</p>



<p>As the Northern Hemisphere ushers in the warmth of spring, East Asia grapples with a less welcome sign of the season: colossal <a href="https://www.earth.com/news/dust-storms-in-the-gulf-of-alaska-help-shape-the-global-climate/" target="_blank" rel="noreferrer noopener">dust storms</a>. </p>



<h2 class="wp-block-heading" id="h-desert-dust-reaches-the-korean-peninsula-nbsp">Desert dust reaches the Korean Peninsula&nbsp;</h2>



<p>Originating from the expansive Gobi and Taklamakan deserts, these dust plumes journey across China, reaching as far as the Korean Peninsula and southern Japan, reshaping the springtime landscape both literally and metaphorically.</p>



<p>The phenomenon was starkly illustrated on April 25, 2024, when NASA's Aqua satellite, equipped with the MODIS (Moderate Resolution Imaging Spectroradiometer) sensor, captured a dramatic image of a massive dust wall traversing the Korean Peninsula.&nbsp;</p>



<h2 class="wp-block-heading" id="h-primary-source-of-the-dust-over-korea">Primary source of the dust over Korea</h2>



<p>The imagery from the preceding day, courtesy of South Korea’s GEO-KOMPSAT-2A satellite and NASA’s Terra and Aqua satellites, pinpointed the Gobi Desert in Inner Mongolia as the primary source of this <a href="https://www.earth.com/news/atmospheric-dust-plays-surprisingly-crucial-role-in-stabilizing-ocean-ecosystems/" target="_blank" rel="noreferrer noopener">dust</a>. </p>



<p>Compounding the environmental spectacle, a phytoplankton bloom, partially veiled by the dust, was visible to the east of the Korean Peninsula, presenting a complex interaction of earth and ocean.</p>



<h2 class="wp-block-heading" id="h-where-does-the-dust-go">Where does the dust go?</h2>



<p>This seasonal dust does not simply settle locally but sometimes ascends high into the atmosphere, occasionally soaring above cloud level. This elevation enables the particles to traverse vast distances, including crossing the Pacific Ocean to North America.&nbsp;</p>



<p>However, not all the <a href="https://www.earth.com/news/sahara-desert-dust-storms-carry-harmful-bacteria-and-fungi-around-the-globe/" target="_blank" rel="noreferrer noopener">dust</a> achieves such heights; much remains nearer to the ground, significantly deteriorating air quality in one of the planet's most densely populated areas.</p>



<p>The health implications of these dust storms are profound. Breathing in the fine particulate matter, particularly PM2.5, is linked to severe cardiovascular and respiratory issues.</p>



<h2 class="wp-block-heading" id="h-dust-storms-in-east-asia-nbsp">Dust storms in East Asia&nbsp;</h2>



<p>Dust storms in East Asia are commonly known as yellow dust, Asian dust, yellow wind, or China dust storms. The storms are typically most frequent in spring and can extend into early summer. They arise when strong winds lift large amounts of sand and dust from deserts in China and Mongolia, then transport these particles across the region.</p>



<p>The key factors contributing to these dust storms include:</p>



<h3 class="wp-block-heading" id="h-natural-conditions">Natural conditions</h3>



<p>The Gobi Desert and other arid regions in China and Mongolia are the primary sources of the dust. The natural aridness and loose soil make these areas prone to dust lift-off under certain meteorological conditions.</p>



<h3 class="wp-block-heading" id="h-meteorological-factors">Meteorological factors</h3>



<p>Spring brings about changes in temperature and pressure, which can result in strong winds. These winds are capable of carrying dust over long distances. The occurrence and intensity of these storms are closely linked to weather patterns such as the strength of the Siberian High and the East Asian jet stream.</p>



<h3 class="wp-block-heading" id="h-human-impact">Human impact</h3>



<p>Overgrazing, <a href="https://www.earth.com/news/global-deforestation-crisis-how-can-we-stop-massive-forest-losses/" target="_blank" rel="noreferrer noopener">deforestation</a>, and land degradation have exacerbated the frequency and intensity of dust storms. Human activities have led to increased desertification, which contributes to the severity of the storms.</p>



<p>Efforts to combat these dust storms have included afforestation projects, such as planting trees to stabilize the soil, and sustainable land management practices aimed at reducing <a href="https://www.earth.com/news/oases-grow-by-human-effort-but-face-threats-from-desertification/" target="_blank" rel="noreferrer noopener">desertification</a>. Regional cooperation among affected countries has also been essential in monitoring and managing the impacts of these dust events.</p>



<h2 class="wp-block-heading" id="h-more-about-the-korean-peninsula-nbsp">More about the Korean Peninsula&nbsp;</h2>



<p>The Korean Peninsula extends southward from the eastern end of the Asian continent and is bordered by the Sea of Japan (East Sea) to the east, the Yellow Sea to the west, and the Korea Strait connecting to the East China Sea to the south. It is divided into two distinct sovereign states: North Korea and South Korea.</p>



<h3 class="wp-block-heading" id="h-historical-context">Historical context</h3>



<p>Historically, the Korean Peninsula was unified for much of its history under various kingdoms such as Goguryeo, Silla, Baekje, and later the Goryeo and Joseon dynasties. The last, the Joseon Dynasty, lasted until the early 20th century.&nbsp;</p>



<p>Following the end of World War II in 1945, the peninsula was divided into North and South Korea in 1948 amid growing Cold War tensions, leading to the Korean War from 1950 to 1953, which ended with an armistice but no formal peace treaty.</p>



<h3 class="wp-block-heading" id="h-cultural-aspects-of-north-and-south-korea">Cultural aspects of North and South Korea </h3>



<p>Korean culture is distinguished by its language, customs, and cuisine. Both North and South Korea share cultural foundations based on their Confucian heritage, which influences social etiquette, family relations, and personal conduct. However, decades of separation have fostered distinct societal developments in each country.</p>



<h3 class="wp-block-heading" id="h-economy">Economy</h3>



<p>North Korea has a largely isolated economy with limited engagement with the international community, heavily reliant on its natural resources and some agricultural output.</p>



<p>South Korea boasts the 10th largest economy in the world (as of 2021), with strong industries in electronics, telecommunications, automobile production, shipbuilding, and chemical manufacturing. It is also a leader in technological innovation and infrastructure.</p>



<h3 class="wp-block-heading" id="h-current-issues">Current issues</h3>



<p>The Korean Peninsula continues to face challenges, including security concerns due to North Korea's nuclear ambitions and the ongoing military tensions between the North and South. </p>



<p>Additionally, both countries deal with internal and external economic pressures, global market dynamics, and cultural exportation impacting global perceptions and economic health.</p>



<p>The Korean Peninsula presents a unique study in contrasts, with profound historical ties and shared cultural elements, yet marked differences in political, economic, and social systems.</p>



<p>Image Credit: NASA Earth Observatory&nbsp;</p>



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Massive wall of dust travels over the Korean Peninsula 

Today's Image of the Day from NASA Earth Observatory features...

<p>Today's <strong>Image of the Day</strong> from <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA Earth Observatory</a> features the picturesque wetlands of Spain's Doñana National Park, This vital ecosystem, located in the Andalusia region, has received some long-awaited rainfall after enduring years of severe <a href="https://www.earth.com/news/climate-change-has-made-droughts-20-times-more-likely/" target="_blank" rel="noreferrer noopener">drought</a> conditions. </p>



<p>A significant increase in rainfall in March 2024 brought temporary relief to this UNESCO World Heritage Site and Biosphere Reserve, known for its rich biodiversity and critical role as a Ramsar Wetland of International Importance.</p>



<h2 class="wp-block-heading" id="h-a-decade-of-drought-in-donana-national-park">A decade of drought in Doñana National Park</h2>



<p>For over a decade, Doñana National Park has faced below-average rainfall levels, with the situation worsening significantly in the past three years. These years have recorded some of the lowest annual precipitation totals, compounded by unusually high temperatures across the country.&nbsp;</p>



<p>The effects of <a href="https://www.earth.com/news/drought-to-downpour-climate-change-triggers-extreme-weather-shifts/" target="_blank" rel="noreferrer noopener">climate change</a> were starkly visible in January 2024, which was noted as Spain's warmest January since records began, with temperatures averaging 2.4 degrees Celsius higher than normal.</p>



<p>The first quarter of 2024 continued this trend, potentially marking it as the warmest first quarter since 1961. The prolonged <a href="https://www.earth.com/news/global-drought-crisis-un-warns-of-unprecedented-emergency/" target="_blank" rel="noreferrer noopener">drought</a> has had a devastating impact on the park’s ecosystem, drying up <a href="https://www.earth.com/news/nearly-all-of-the-worlds-salt-marshes-may-be-underwater-by-2100/" target="_blank" rel="noreferrer noopener">marshes</a> and affecting both flora and fauna.</p>



<h2 class="wp-block-heading" id="h-welcome-change-in-the-weather">Welcome change in the weather</h2>



<p>The heavy rains that arrived in late March 2024 have momentarily brought some relief to the region. Satellite images acquired by the OLI on Landsat 8 and the OLI-2 on Landsat 9 showed significant changes in the landscape by April 9, 2024.&nbsp;</p>



<p>The featured image shows that marshes have been replenished and ponds have been temporarily filled, contrasting sharply with the desolate conditions observed just a year earlier.</p>



<p>A weather station in the park recorded 145 millimeters of rainfall in March 2024, making it the second-wettest March on record. Since the start of the water year in September 2023, the area has received over 400 millimeters of rainfall, surpassing the totals of each of the last three full water years. Despite this increase, the precipitation still falls short of the historical yearly average of more than 500 millimeters.</p>



<h2 class="wp-block-heading" id="h-ecological-responses-and-challenges">Ecological responses and challenges</h2>



<p>The western part of the park is home to thousands of small, shallow pools known as Mediterranean temporary ponds, which naturally experience cycles of flooding and drying. Following the recent rains, several of the largest ponds flooded, as did marsh areas farther inland, though some regions remained dry.</p>



<p>The Doñana Biological Station reported that this influx of water led to a resurgence of vegetation beneficial to breeding waterfowl such as coots, grebes, and herons.&nbsp;</p>



<p>However, despite these positive signs, the challenges remain significant. Development pressures from agricultural fields and an adjacent resort town continue to strain the local aquifer, exacerbating the water scarcity and impacting the wetland's ecological balance.</p>



<h2 class="wp-block-heading" id="h-long-term-concerns-for-donana-national-park">Long-term concerns for Doñana National Park</h2>



<p>Javier Bustamante, a researcher at the Doñana Biological Station, emphasized that while the rainfall has eased some of the immediate drought-related issues, it does not address the deeper problem of groundwater overexploitation.&nbsp;</p>



<p>"The rains have partially alleviated the most immediate drought problems, but they do not solve the invisible problem of groundwater overexploitation," Bustamante stated, highlighting the complex nature of the challenges facing Doñana.</p>



<p>The overall effect of the rainfall will become clearer in the coming months, but experts caution that the changes observed might not signify long-term relief. Conservation efforts continue to focus on managing external pressures and restoring the ecological balance to preserve Doñana National Park for future generations.</p>



<h2 class="wp-block-heading" id="h-more-about-donana-national-park">More about Doñana National Park</h2>



<p>Doñana National Park is one of Europe's most important and diverse natural reserves. This vast park stretches across parts of the provinces of Huelva, Seville, and Cádiz. It was established as a national park in 1969 and covers an area of approximately 543 square kilometers.</p>



<p>The park is celebrated for its extraordinary biodiversity. It serves as a critical stopover, breeding, and wintering site for thousands of European and African migratory birds.&nbsp;</p>



<p>Doñana's complex ecosystem includes <a href="https://www.earth.com/news/coastal-wetlands-are-inching-closer-to-extinction-as-the-world-heats-up/" target="_blank" rel="noreferrer noopener">marshlands</a>, shallow streams, and sand dunes, providing habitat for a wide variety of plant and animal species. Among its notable inhabitants are the Iberian lynx and the Spanish imperial eagle, both of which are endangered species.</p>



<p>Doñana also has a rich cultural heritage; it has been influenced by various civilizations throughout history, including the Romans and Moors. This history is reflected in the archaeological sites found within its boundaries, including the remains of the town of La Algaida.</p>



<p>Image Credit: NASA Earth Observatory&nbsp;</p>



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Doñana National Park gets temporary relief from drought

<p>Today's <strong>Image of the Day</strong> from <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA Earth Observatory</a> features Ruang, a small volcanic island in North Sulawesi, Indonesia. The tranquil environment of Ruang was shattered by a powerful volcanic eruption on the night of April 16, 2024.</p>



<p>This event has left the island's 800 residents grappling with its devastating aftermath, while scientists are assessing its potential global effects.</p>



<h2 class="wp-block-heading" id="h-a-violent-awakening-on-ruang">A violent awakening on Ruang</h2>



<p>Ruang, located in the Sangihe Islands arc, is known for its long history of <a href="https://www.earth.com/news/volcanic-eruptions-play-an-overlooked-role-in-earths-climate/" target="_blank" rel="noreferrer noopener">volcanic activity</a>, but the intensity of the latest eruption has been particularly alarming. The <a href="https://www.earth.com/news/explosive-volcanic-eruption-triggered-an-hours-long-thunderstorm/" target="_blank" rel="noreferrer noopener">eruption</a> produced explosive discharges, sending vast plumes of ash and gas soaring into the stratosphere. The force of nature transformed lush greenery into a gray wasteland.</p>



<p>“Late on April 16, 2024, the mountain roared to life, unleashing a series of explosive eruptions that, at times, sent plumes of ash and gas billowing high into the stratosphere. The eruption also bombarded the island with tephra, small pebbles of lapilli, and fine shards of pulverized rock called ash,” said NASA.</p>



<h2 class="wp-block-heading" id="h-extensive-damage-and-humanitarian-efforts">Extensive damage and humanitarian efforts</h2>



<p>The eruption's immediate impact was severe, with settlements on the north side of Ruang and Laingpatehi village experiencing extensive damage due to volcanic debris.&nbsp;</p>



<p>More than 500 houses were destroyed or severely damaged, according to Indonesia’s disaster management agency, Badan Nasional Penanggulangan Bencana (BNPB). The heavy ashfall also impacted local agriculture, damaging crops and farms.&nbsp;</p>



<p>In response to the crisis, the Sam Ratulangi International Airport in nearby Manado was temporarily closed, disrupting travel and causing widespread flight cancellations. It was not until April 22 that the airport could reopen, following significant cleanup efforts and a decrease in the volcanic threat level.</p>



<h2 class="wp-block-heading" id="h-scientific-analysis-and-global-concerns">Scientific analysis and global concerns</h2>



<p>The eruption has attracted significant scientific interest due to the vast quantities of ash and sulfur dioxide it emitted. Atmospheric scientist Ghassan Taha from NASA’s Goddard Space Flight Center noted, "We expect to see aerosol particles circulating in the stratosphere for weeks, if not months." This observation is critical as particles reaching this altitude can have extensive, albeit temporary, effects on global climate patterns.</p>



<p>Volcanologist Simon Carn from Michigan Technological University reported that the eruption released between 0.3 to 0.5 teragrams of sulfur dioxide on April 17 and 18. These levels, while substantial, fall below the threshold generally required to affect global temperatures significantly.&nbsp;</p>



<p>For context, the 1991 Mount Pinatubo eruption, which had a pronounced cooling effect on the Earth's climate, released approximately 20 teragrams of sulfur dioxide.</p>



<h2 class="wp-block-heading" id="h-preparedness-and-future-risks">Preparedness and future risks</h2>



<p>In light of Ruang's active volcanic history and the potential for further eruptions, local authorities remain vigilant. The risk of lahars and tsunamis prompted immediate evacuations and multiple tsunami warnings, though, fortunately, no substantial tsunamis have occurred thus far. Over 16,000 residents have been evacuated from the most vulnerable areas, a move that has likely prevented any fatalities or serious injuries.</p>



<p>The 2024 <a href="https://www.earth.com/news/underwater-volcanic-eruptions-are-more-harmful-than-previously-believed/" target="_blank" rel="noreferrer noopener">eruption</a> of Ruang is a stark reminder of the powerful and often unpredictable nature of volcanic islands. While the local and immediate impacts are devastating, the eruption also offers valuable data for scientists studying the broader implications of such natural events on atmospheric conditions and climate. </p>



<h2 class="wp-block-heading" id="h-more-about-ruang">More about Ruang</h2>



<p>The population on Ruang is small, with residents primarily engaged in subsistence fishing and agriculture, which is typical of remote Indonesian islands. The island's terrain and soil fertility, influenced by volcanic ash, may support the cultivation of certain crops that are adapted to such conditions.</p>



<p>The Ruang volcano rises to about 725 meters above sea level, making it a prominent feature in the region. This area is part of the volcanic arc that includes numerous volcanoes produced by the subduction of the oceanic plate under the continental margin.</p>



<p>The active stratovolcano has had several recorded eruptions in history, with significant activity occurring in 1871, 1873, and 2002.&nbsp;</p>



<p>The image was captured by the Operational Land Imager (OLI) on April 20, 2024.</p>



<p>Image Credit: NASA Earth Observatory&nbsp;</p>



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Ruang volcano eruption has devastated the tranquil island

<p>Today's <strong>Image of the Day</strong> from <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA Earth Observatory</a> features the Bermejo River and the Río Grande de Tarija, which flow through Argentina and Bolivia in South America. The photograph was captured by an astronaut onboard the International Space Station.</p>



<h2 class="wp-block-heading" id="h-meandering-rivers">Meandering rivers</h2>



<p>“The meandering rivers in this image are sourced in the Andes Mountains and generally flow southeast through valleys in the foothills - the region between the high mountains and plains. The Iruya River deposits particles of silt and clay as it flows into the valley centered in this image,” said NASA.</p>



<p>“Visible indications of the rivers’ shifting channels include river islands, point bars (on the inside curve of streams), and several meander scars. Such scars form when a river gets cut off from the main flow and fills in with sediment, soil, and vegetation.”</p>



<p>“Sediment from the adjacent highlands filled valleys that were formed by tectonic forces driving uplift of the Andes. These deposits are subsequently carried by rivers, such as the Iruya, along with new sediment to form the light-toned braided channels and the adjacent darker-toned floodplains. Nutrient-rich floodplain soils provide fertile ground for agricultural fields.”</p>



<h2 class="wp-block-heading" id="h-bermejo-river">Bermejo River</h2>



<p>The Bermejo River originates in the Bolivian <a href="https://www.earth.com/news/biodiversity-hotspots-are-shrinking-in-the-andes-mountains/" target="_blank" rel="noreferrer noopener">Andes</a> and flows into Argentina. It plays a crucial role in the geographical and ecological landscape of the region. The river's course is characterized by its meandering path through the Gran Chaco plain, making it a significant river in the region's hydrological system.</p>



<h3 class="wp-block-heading" id="h-economic-importance">Economic importance</h3>



<p>The Bermejo River is vital for agriculture, providing essential water resources for irrigation. It also has potential for hydroelectric power generation.</p>



<h3 class="wp-block-heading" id="h-biodiversity-nbsp">Biodiversity&nbsp;</h3>



<p>The diverse habitats created by the Bermejo River, including its riverbanks, floodplains, and adjacent forests, support rich biodiversity. However, the wildlife in this region faces threats from habitat destruction, pollution, and climate change, making conservation efforts critical for their survival.</p>



<p><a href="https://www.earth.com/news/jaguars-in-the-amazon-are-threatened-by-climate-extremes/" target="_blank" rel="noreferrer noopener">Jaguars</a> are the apex predators of this region, and are occasionally spotted along the riverbanks, where they hunt. Large, herbivorous mammals called tapirs are found in the forests around the Bermejo River. They often visit the river to drink and cool off.</p>



<p>Capibaras, the world’s largest rodents, are commonly found in the wetlands and along the river edges.</p>



<p>The tallest flying bird found in South and Central America, jabirus can often be seen in wetlands along the Bermejo River. Toco toucans, known for their colorful bills, can be found in the forested areas near the river.</p>



<h2 class="wp-block-heading" id="h-rio-grande-de-tarija">Río Grande de Tarija</h2>



<p>The Río Grande de Tarija, also known in its lower stretches as the Guadalquivir, flows primarily within Bolivia. It is a critical watercourse in the Tarija Department, contributing significantly to the region's agriculture and livelihoods.</p>



<h3 class="wp-block-heading" id="h-economic-importance-0">Economic importance</h3>



<p>This river is essential for irrigation, supporting a variety of crops and contributing to the local economy. The surrounding lands are fertile and productive, thanks to the river's water.</p>



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



<p>Similar to other rivers, the Río Grande de Tarija faces challenges such as water management issues, <a href="https://www.earth.com/news/predicting-the-effects-of-pollutants-on-river-ecosystems/" target="_blank" rel="noreferrer noopener">pollution</a>, and the impacts of climate change on its flow and health.</p>



<h3 class="wp-block-heading" id="h-wildlife-in-bolivian-rivers">Wildlife in Bolivian rivers</h3>



<p>River basins in Bolivia are home to a wide range of bird species, including various species of herons, egrets, kingfishers, and perhaps even some rarer species like the wattled jacana or the sunbittern. The diverse birdlife is attracted to the abundance of fish and the relatively untouched natural habitats along the river.</p>



<p>The Characidae family includes many fish species that are commonly found in South American rivers, such as tetras. They are known for their diversity and are a key part of the river's ecosystem, serving as both <a href="https://www.earth.com/news/diving-to-extremes-predatory-fish-frequent-the-oceans-twilight-zone/" target="_blank" rel="noreferrer noopener">predator</a> and prey.</p>



<p>Cichlids are another diverse group of fish that can be found in South American rivers. They are appreciated by aquarium enthusiasts worldwide and play significant roles in their ecosystems as both predators and herbivores.</p>



<p>The rivers of Bolivia are also home to various catfish species, which are well adapted to life in muddy and turbulent waters. These include the armored catfish, which are often found clinging to rocks and logs.</p>



<p>Image Credit: NASA Earth Observatory/ ISS Crew Earth Observations Facility/ Earth Science and Remote Sensing Unit, Johnson Space Center</p>



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<h3 class="wp-block-heading" id="h-nbsp">&nbsp;</h3>

The Río Grande de Tarija and Bermejo River in South America

<p>Today's <strong>Image of the Day</strong> from <a href="https://earthobservatory.nasa.gov/" target="_blank" rel="noreferrer noopener">NASA Earth Observatory</a> features the delta of the Ebro River on the northeast coast of Spain, captured by the Copernicus Sentinel-2 mission.</p>



<h2 class="wp-block-heading" id="h-ebro-river">Ebro River</h2>



<p>“Stretching across 910 km of northern Spain, the Ebro River is the second-longest river in the Iberian Peninsula. In the image, it can be seen as a green line winding its way through the peninsula before flowing into the Mediterranean, shaping the Ebro Delta,” noted ESA.</p>



<p>“The Ebro River discharges more water into the sea than any other river in Spain. As suspended sediment flows from the river’s mouth, it tints the coastal waters with a turquoise hue.”</p>



<h2 class="wp-block-heading" id="h-ebro-delta">Ebro Delta</h2>



<p>The Ebro Delta is one of the largest <a href="https://www.earth.com/news/wetland-methane-emissions-have-surged-at-high-latitudes/">wetland areas</a> in the western Mediterranean region. The river's basin is the largest in Spain, covering about 85,000 square kilometers.</p>



<h2 class="wp-block-heading" id="h-historical-significance-nbsp">Historical significance&nbsp;</h2>



<p>Historically, the Ebro River has been significant in numerous battles, including the famous Battle of the Ebro during the Spanish Civil War, which was one of the war's longest and deadliest conflicts.&nbsp;</p>



<h2 class="wp-block-heading" id="h-economic-significance-nbsp">Economic significance&nbsp;</h2>



<p>Economically, the Ebro plays a crucial role in agriculture, particularly in regions like La Rioja and Navarre, which are known for their vineyards. Additionally, the river supports various industries and hydroelectric power generation.</p>



<h2 class="wp-block-heading" id="h-ecological-significance">Ecological significance</h2>



<p>The Ebro Delta is ecologically rich, providing habitat for diverse bird species. It is also a vital area for rice cultivation in Spain.&nbsp;</p>



<h3 class="wp-block-heading" id="h-nature-reserve">Nature reserve</h3>



<p>“Most of the delta comprises the Ebro Delta Nature Reserve. With its protected wetlands, beaches, marshes, salt pans and estuaries, this reserve provides a natural habitat for numerous migratory birds and waterfowl,” said ESA.</p>



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



<p>The river and its delta face environmental challenges such as pollution, water extraction for irrigation, and the impacts of <a href="https://www.earth.com/news/climate-change-may-have-altered-river-flow-worldwide/">climate change</a>, which threaten its ecosystem and the sustainability of its water resources.</p>



<h2 class="wp-block-heading" id="h-the-northeast-coast-of-spain">The northeast coast of Spain</h2>



<p>The northeast coast of Spain is a vibrant and diverse region, characterized by its rich history, unique culture, and stunning landscapes. </p>



<p>It includes the autonomous communities of Catalonia, which features the dynamic city of Barcelona, and part of the Valencian Community. This area is also part of what is known as the Costa Brava, which stretches from the town of Blanes up to the French border.</p>



<h3 class="wp-block-heading" id="h-geography">Geography</h3>



<p>The <a href="https://www.earth.com/news/human-activity-impacts-97-percent-of-the-worlds-coastline/">coastline</a> is renowned for its rugged beauty, with rocky cliffs, secluded coves, and small beaches. The interior regions feature mountains such as the Pyrenees, which offer skiing in winter and hiking in the summer.</p>



<h3 class="wp-block-heading" id="h-cultural-heritage">Cultural heritage</h3>



<p>The area has a strong cultural identity, particularly in Catalonia, where there is a significant movement for independence. The Catalan language is widely spoken alongside Spanish. The region is also known for its festivals, architecture (notably the works of Antoni Gaudí in Barcelona), and traditional dances like the Sardana.</p>



<h3 class="wp-block-heading" id="h-cuisine">Cuisine</h3>



<p>The cuisine is a delightful mix of fresh seafood from the Mediterranean, traditional Catalan dishes like "pa amb tomàquet" (bread with tomato), and rice dishes such as paella in the Valencian region. The area is also famous for its wines, including the sparkling wine Cava.</p>



<h3 class="wp-block-heading" id="h-tourism">Tourism</h3>



<p>The northeast coast attracts millions of tourists each year due to its beautiful beaches, historical sites, and vibrant cities. Barcelona, in particular, is a major tourist destination with attractions like the Sagrada Familia, Park Güell, and the bustling La Rambla.</p>



<h3 class="wp-block-heading" id="h-economy">Economy</h3>



<p>The economy of the northeast coast is one of the most dynamic in Spain, with Barcelona serving as a major hub for trade, education, entertainment, and technology.</p>



<p>Image Credit: NASA Earth Observatory</p>



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The Ebro River on the northeast coast of Spain

White-tailed,Deer,(odocoileus,Virginianus),Sniffs,Behind,Fawn's,Ears,-,Captive

<p>The boreal forest of Western Canada – a vast, wild expanse of trees and waterways – is undergoing a stealthy transformation. White-tailed deer, icons of more southerly landscapes, are migrating northward. </p>



<p>This slow-motion <a href="https://www.earth.com/news/deer-migration-is-driven-by-springtime-vegetation-patterns/" target="_blank" rel="noreferrer noopener">migration</a>, meticulously tracked by scientists at the University of British Columbia (<a href="https://ok.ubc.ca" target="_blank" rel="noreferrer noopener">UBC</a>) Okanagan and their partners, is rewriting the rules of the forest, putting a beloved species, the woodland <a href="https://www.earth.com/earthpedia-articles/largest-on-earth-caribou-migration/" target="_blank" rel="noreferrer noopener">caribou</a>, at further risk.</p>



<h2 class="wp-block-heading" id="h-changing-landscape-from-migrating-white-tailed-deer">Changing landscape from migrating white-tailed deer</h2>



<p>The boreal forest is no stranger to cold, but climate change is making those winters milder. For <a href="https://www.earth.com/news/energy-development-disrupts-mule-deer-migration/" target="_blank" rel="noreferrer noopener">deer</a>, those less extreme conditions mean a better chance of finding food and avoiding harsh weather.</p>



<p>Our activities, from logging to energy exploration, inadvertently create open patches and young forests – a buffet for browsing deer.</p>



<p>“The trick is that human land use and climate are often intertwined. As we move northward, the climate becomes harsher and human land use decreases, making it difficult to isolate these two factors,” says Dr. Rob Serrouya, a key member of the research team.</p>



<p>“The debate over the relative effect of climate or habitat change isn’t unique to deer in the boreal, either; it’s one of the most pressing issues facing applied ecologists globally," Serrouya continued.</p>



<h2 class="wp-block-heading" id="h-migrating-white-tailed-deer-are-disturbing-caribou">Migrating white-tailed deer are disturbing caribou</h2>



<p>"<a href="https://www.earth.com/news/some-deer-are-protected-from-deadly-disease-by-genetics/" target="_blank" rel="noreferrer noopener">Deer</a> are ecosystem disruptors in the northern boreal forests," explained Melanie Dickie, a doctoral student at UBC Okanagan's <a href="http://atford.weebly.com/" target="_blank" rel="noreferrer noopener">Wildlife Restoration Ecology Lab</a>. The following steps threaten caribou survival:</p>



<h3 class="wp-block-heading" id="h-deer-population-increases">Deer population increases</h3>



<p>Climate change and human activities are transforming habitats. This creates favorable conditions for white-tailed deer in the boreal forest. Their population grows as a result. </p>



<p>Milder winters make survival easier for deer, boosting their numbers. Forestry and energy exploration activities also modify the landscape and clear old forests and introduce new food sources. These changes further support the deer population boom.</p>



<h3 class="wp-block-heading" id="h-wolf-surge">Wolf surge</h3>



<p>The increase in deer provides a plentiful food source for predators, including wolves. Wolves, being opportunistic feeders, thrive with the abundance of deer, which become their primary prey. </p>



<p>This surge in wolf population is directly linked to the availability of deer, as they rely on them for sustenance throughout the year.</p>



<h3 class="wp-block-heading" id="h-caribou-decline">Caribou decline</h3>



<p>With more wolves in the forests, the pressure on other native species, particularly the woodland caribou, intensifies. Caribou are less equipped to handle predation pressure due to their slower reproductive rates and specific habitat requirements. </p>



<p>As wolves expand their hunting to include <a href="https://www.earth.com/news/caribou-migratory-behavior-is-reflected-in-their-genes/" target="_blank" rel="noreferrer noopener">caribou</a>, especially when deer are sparse or in areas where caribou are more accessible, the survival of this already threatened species becomes even more precarious.</p>



<h2 class="wp-block-heading" id="h-impact-of-climate-change">Impact of climate change</h2>



<p>The research team spent years meticulously monitoring the situation. They strategically deployed 300 wildlife cameras across a huge swathe of the boreal, gathering motion-triggered snapshots of the forest's inhabitants. </p>



<p>This massive data, once analyzed, revealed those key findings: harsh winters put a natural limit on deer expansion, and while human habitat changes matter, they pale in comparison to the transformative power of a changing climate.</p>



<h2 class="wp-block-heading" id="h-caribou-migrating-white-tailed-deer-and-climate-change">Caribou, migrating white-tailed deer, and climate change</h2>



<p>“The trick is that human land use and climate are often intertwined. As we move northward, the climate becomes harsher and human land use decreases, making it difficult to isolate these two factors,” says Dr. Serrouya, UBCO and Biodiversity Pathways researcher. </p>



<p>“The debate over the relative effect of climate or habitat change isn’t unique to deer in the boreal, either; it’s one of the most pressing issues facing applied ecologists globally," Serroyua concludes.</p>



<p>The white-tailed deer invasion spotlights the interconnectedness of ecosystems – tug on one thread, and distant parts of the web might quiver. Woodland <a href="https://www.earth.com/news/caribou-help-rare-plants-survive-climate-change/" target="_blank" rel="noreferrer noopener">caribou</a> are already facing an uphill battle, and this added challenge throws their future into greater doubt.</p>



<p>The northward march of the deer is a reminder that even subtle climate-driven changes can have ripple effects we must work to understand and mitigate. As researchers continue their work, wildlife management faces a new layer of complexity in their quest to preserve Canada's iconic caribou.</p>



<p>The study is published in <em><a href="https://onlinelibrary.wiley.com/doi/10.1111/gcb.17286" target="_blank" rel="noreferrer noopener">Global Change Biology</a></em>.</p>



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White-tailed deer are migrating north into caribou country due to warming climate

The boreal forest of Western Canada – a vast, wild...

<p>Snow isn't just the pristine, fluffy blanket that covers our winterscapes; it's a dynamic and multifaceted element of nature. </p>



<p>At first glance, describing snow seems straightforward - it's cold, white, and ubiquitous in <a href="https://www.earth.com/news/why-winters-are-getting-colder-while-world-is-getting-warmer/" target="_blank" rel="noreferrer noopener">winter</a> landscapes. </p>



<p>However, beneath its simple appearance lies a complex nature that has recently attracted significant scientific attention.</p>



<h2 class="wp-block-heading" id="h-a-deep-dive-into-the-complexity-of-snow">A deep dive into the complexity of snow</h2>



<p>A recent doctoral thesis defended at the Norwegian University of Science and Technology (<a href="https://www.ntnu.edu/" target="_blank" rel="noreferrer noopener">NTNU</a>) in Gjøvik delves deep into the optical properties of snow. </p>



<p>The researcher, Mathieu Nguyen, has conducted an extensive study analyzing over a thousand images of snow to understand how it interacts with light.</p>



<p>Nguyen explained: "Snow reflects all wavelengths of light and can appear very different depending on the conditions and the angle at which light hits it. The age and density of the snow and air pollution also affect what it looks like. <a href="https://www.earth.com/news/changes-humidity-snowmelt-water/" target="_blank" rel="noreferrer noopener">Snow’s appearance</a> is a very complicated matter."</p>



<h2 class="wp-block-heading" id="h-the-science-of-sparkling-snow">The science of sparkling snow</h2>



<p>One of Nguyen's primary interests has been how snow absorbs and reflects sunlight, causing the <a href="https://www.earth.com/news/the-science-of-snowflakes-and-their-astonishingly-predictable-movement/" target="_blank" rel="noreferrer noopener">snow crystals</a> to sparkle spectacularly on sunny days. </p>



<p>These crystals act like tiny mirrors, reflecting sunlight directly at viewers and creating a "spark" effect in the landscape. This phenomenon is not only beautiful but also potentially very useful.</p>



<p>"Understanding how snow sparkles can help us in many practical ways, from improving road clearance decisions to enhancing <a href="https://www.earth.com/image/traces-of-a-glacier-avalanche/" target="_blank" rel="noreferrer noopener">avalanche</a> monitoring in mountainous regions," said Nguyen.</p>



<h2 class="wp-block-heading" id="h-the-potential-for-future-technologies">The potential for future technologies</h2>



<p>The implications of Nguyen's research are broad. He believes that this understanding could be crucial for the development of sensor technologies, especially in countries like Norway, where snow is a significant part of the landscape. </p>



<p>Such technologies could make winter travel safer, particularly with the advent of autonomous vehicles.</p>



<p>Furthermore, Nguyen's work could lead to more accurate methods for classifying different <a href="https://www.earth.com/video/six-different-types-snowflakes/" target="_blank" rel="noreferrer noopener">types of snow</a> from images - a capability that is currently lacking. </p>



<p>"If we are to have fully autonomous cars here in Norway, this type of technology will also contribute to safer travel on winter roads," he noted.</p>



<h2 class="wp-block-heading" id="h-a-global-perspective-is-necessary">A global perspective is necessary</h2>



<p>To refine these classifications, Nguyen emphasizes the need for a more extensive dataset, ideally with images from various global locations. </p>



<p>"It will be important to get images from other places where the environment is different. Understanding how different levels of pollution play a role in the appearance and properties of snow will be crucial," said Nguyen.</p>



<h2 class="wp-block-heading" id="h-snow-in-digital-and-future-realities">Snow in digital and future realities</h2>



<p>The digital representation of snow, as seen in video games and simulators, often falls short of capturing its true complexity. </p>



<p>Nguyen's findings promise to bridge this gap, offering a more realistic depiction of snow that could enhance virtual experiences, especially as global climates change and snow becomes less prevalent in many regions.</p>



<p>Nguyen's dedication to his research could not only revolutionize our understanding of snow but also help us prepare for a future where snow might be a rarer sight. </p>



<p>"If we are to teach someone who may never have seen snow before what it is, we must be able to reproduce it in all its complexity," said Nguyen.</p>



<h2 class="wp-block-heading" id="h-the-future-of-snow-research">The future of snow research</h2>



<p>With climate predictions suggesting significant reductions in <a href="https://www.earth.com/news/accurately-measure-snowfall-new/" target="_blank" rel="noreferrer noopener">snowfall</a> across the Northern Hemisphere, Nguyen's work is timely. </p>



<p>By improving our understanding of snow's properties and enhancing its digital representation, this research not only satisfies scientific curiosity but also prepares us for a changing world where the familiar sight of winter snow may become a precious memory.</p>



<h2 class="wp-block-heading">More about snow</h2>



<p>Snow is a form of precipitation that occurs when water vapor in the atmosphere freezes into ice crystals. These crystals form unique, six-sided structures and can clump together to create snowflakes.&nbsp;</p>



<p>Snow is distinct from other forms of winter precipitation such as sleet or freezing rain, primarily due to its soft, fluffy texture. It typically falls during colder months when the air temperature is at or below freezing.&nbsp;</p>



<p>The presence of snow can influence an area's climate and ecosystem, providing moisture essential for many regions, and it is a key component of winter sports and recreational activities.&nbsp;</p>



<p>The insulating properties of snow also affect soil temperatures and plant life, impacting agriculture and wildlife patterns. Snow's reflective surface helps regulate the Earth's temperature by reflecting sunlight, thus playing a role in the global climate system.</p>



<p>The study is published in the journal <a href="https://www.mdpi.com/2076-3263/14/2/35" target="_blank" rel="noreferrer noopener"><em>Geosciences</em></a>.</p>



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Secrets of snow complexity can improve winter safety

Snow isn't just the pristine, fluffy blanket that covers our...

<p>Cannabis use has long been associated with stereotypes of laziness and lack of motivation. However, a recent study challenges these preconceived notions, shedding new light on the everyday lives of chronic <a href="https://www.earth.com/news/recreational-cannabis-use-protects-against-cognitive-decline/" target="_blank" rel="noreferrer noopener">cannabis users</a>.</p>



<h2 class="wp-block-heading" id="h-busting-the-lazy-stoner-myth">Busting the lazy stoner myth</h2>



<p>The intriguing research, led by Michael Inzlicht, a professor in the Department of Psychology at <a href="https://www.utsc.utoronto.ca/home/" target="_blank" rel="noreferrer noopener">U of T Scarborough</a>, was published in the journal <em>Social Psychological and Personality Science</em>. </p>



<p>The study surveyed 260 chronic cannabis users, defined as those who <a href="https://www.earth.com/news/half-of-americans-have-tried-cannabis-and-nearly-a-fifth-use-it-regularly/" target="_blank" rel="noreferrer noopener">consume cannabis</a> at least three times a week or more, to investigate the effects of getting high on their daily lives.</p>



<p>"There is a stereotype that chronic cannabis users are somehow lazy or unproductive," says Inzlicht. "We found that's not the case -- their behaviors might change a bit in the moment while they're high, but our evidence shows they are not lazy or lacking motivation at all."</p>



<h2 class="wp-block-heading" id="h-getting-high-and-getting-things-done">Getting high and getting things done</h2>



<p>One of the most interesting findings of the study relates to motivation. The researchers examined participants' willingness to exert effort in completing a task while high and found that they were just as motivated and willing to invest effort as when they were not under the <a href="https://www.earth.com/news/after-centuries-of-speculation-heres-what-really-causes-the-munchies/" target="_blank" rel="noreferrer noopener">influence of cannabis</a>.</p>



<p>The study did reveal that getting high led to lower levels of self-regulation, an important trait for accomplishing tasks. </p>



<p>When chronic users were high, they exhibited behaviors such as increased impulsivity, less thoughtfulness, and less orderliness. However, these factors did not make them less hard-working, responsible, or able to focus.</p>



<p>Interestingly, the researchers discovered that chronic cannabis users experienced a boost in positive emotions like awe and gratitude. In addition, they reported a reduction in negative emotions such as fear and <a href="https://www.earth.com/news/chemical-found-in-cannabis-plants-can-actually-reduce-cannabis-induced-anxiety/" target="_blank" rel="noreferrer noopener">anxiety while high</a>. </p>



<p>However, those who consumed cannabis more frequently experienced more negative emotions both while high and while sober.</p>



<h2 class="wp-block-heading" id="h-no-weed-hangover-helps-debunk-the-cannabis-stereotype">No "weed hangover" helps debunk the cannabis stereotype</h2>



<p>The study found no evidence of a "weed hangover," meaning that chronic users did not experience a decline in emotional or motivational function the day after being high.</p>



<p>Professor Inzlicht runs the <a href="http://michaelinzlicht.com/#lab-view" target="_blank" rel="noreferrer noopener">Work and Play Lab</a>, which focuses on self-control, motivation, empathy, and the use of social media, digital devices, and recreational cannabis. </p>



<p>He emphasizes the importance of taking a neutral, clear-eyed approach to studying the <a href="https://www.earth.com/news/smoking-cannabis-significantly-increases-the-risk-of-heart-attack/" target="_blank" rel="noreferrer noopener">effects of cannabis</a> on chronic users in their everyday lives.</p>



<p>"Part of the motivation for this study is to take a neutral, clear-eyed approach to see how cannabis affects chronic users in their everyday lives," Inzlicht explains.</p>



<h2 class="wp-block-heading">Comparing alcohol and cannabis hangovers</h2>



<h3 class="wp-block-heading" id="h-enduring-the-aftermath-of-a-night-of-drinking">Enduring the aftermath of a night of drinking</h3>



<p><a href="https://www.earth.com/news/no-more-alcohol-hangovers-thanks-to-new-medicine/" target="_blank" rel="noreferrer noopener">Alcohol hangovers</a> are a well-known phenomenon, characterized by a range of unpleasant symptoms that occur after a night of heavy drinking. These symptoms often include headaches, nausea, fatigue, dehydration, and sensitivity to light and sound. </p>



<p>The severity of an alcohol hangover depends on various factors, such as the amount and type of alcohol consumed, as well as individual tolerance levels.</p>



<p>The primary cause of alcohol hangovers is dehydration, as alcohol is a diuretic that promotes the production of urine. Additionally, alcohol irritates the lining of the stomach, leading to inflammation and the production of stomach acids, which can contribute to nausea and vomiting.</p>



<h3 class="wp-block-heading">Aftermath of cannabis use</h3>



<p>In contrast to alcohol hangovers, the concept of a "<a href="https://www.earth.com/news/most-cannabis-users-no-longer-need-conventional-sleep-aids/" target="_blank" rel="noreferrer noopener">weed hangover</a>" is less clearly defined. While some cannabis users report experiencing residual effects the day after heavy use, these effects are generally milder and less debilitating than those associated with alcohol hangovers.</p>



<p>Research on the topic is limited, but some studies suggest that heavy cannabis use may lead to symptoms such as fatigue, dry mouth, and mild cognitive impairment the following day. </p>



<p>However, these effects are not universally experienced by all users and may depend on factors such as the amount and potency of cannabis consumed, as well as individual tolerance levels.</p>



<p>Unlike alcohol, cannabis does not cause dehydration or significant inflammation in the body, which may explain why cannabis hangovers are typically less severe than alcohol hangovers.</p>



<h2 class="wp-block-heading" id="h-hard-working-motivated-and-high-can-you-be-all-three">Hard-working, motivated, and high: Can you be all three?</h2>



<p>While this study is not an endorsement of heavy cannabis use, and there is ample research highlighting the risks associated with heavy use, especially <a href="https://www.earth.com/news/cannabis-legalization-does-not-increase-youth-substance-abuse/" target="_blank" rel="noreferrer noopener">among adolescents</a>, it provides valuable insights into the experiences of regular users.</p>



<p><a href="https://www.statcan.gc.ca/en/start" target="_blank" rel="noreferrer noopener">Statistics Canada</a> data shows that nearly one in 10 adult Canadians are regular cannabis users, coming from all walks of life. </p>



<p>Despite its increased legal and social acceptance, relatively little is known about the everyday experiences of these individuals.</p>



<p>"Our data suggests that you can be hard-working, motivated and a chronic cannabis user at the same time," concludes Inzlicht.</p>



<h2 class="wp-block-heading" id="h-taking-cannabis-into-the-future-by-ditching-stereotypes">Taking cannabis into the future by ditching stereotypes</h2>



<p>In summary, this eye-opening study challenges deeply entrenched stereotypes about chronic cannabis users, revealing that they can be just as motivated, <a href="https://www.earth.com/news/runners-high-cannabis-makes-exercise-more-enjoyable-and-boosts-motivation/" target="_blank" rel="noreferrer noopener">hard-working</a>, and capable of exerting effort as non-users. </p>



<p>By taking a neutral, unbiased approach to examining the everyday experiences of regular cannabis users, Professor Michael Inzlicht and his team at the Work and Play Lab have opened the door to a more nuanced understanding of the effects of cannabis on individuals' lives. </p>



<p>As cannabis gains increasing legal and social acceptance, this research underscores the importance of moving beyond outdated stereotypes and focusing on evidence-based insights to inform our perceptions and policies surrounding cannabis use.</p>



<p>The full study was published in the journal <em><a href="https://journals.sagepub.com/doi/10.1177/19485506241245744" target="_blank" rel="noreferrer noopener">Social Psychological and Personality Science</a>.</em></p>



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Cannabis smokers are not lazy or unmotivated, despite stereotypes

Cannabis use has long been associated with stereotypes of laziness...

<p></p>
<div id="58e3ebce955a315103d39bd1" class="vdb_player vdb_58e3ebce955a315103d39bd158d96b98cd4fed198a0d2a49" vdb_params="m.embeded=cms_video_plugin_www.earth.com"  data-placeholder="//img.vidible.tv/prod/2019-06/27/5d14b9238c3ae80c15a3970a/5d14b972fcdcf60001a8ee39_6000x4000_FES_v1.jpg?w=4320&#038;h=2700&#038;q=60">
    <script type="text/javascript" src="https://delivery.vidible.tv/jsonp/pid=58e3ebce955a315103d39bd1/vid=5d14b9238c3ae80c15a3970a/58d96b98cd4fed198a0d2a49.js?m.embeded=cms_video_plugin_www.earth.com"></script>
</div>
<p><br />
<span style="font-weight: 400;">Today&#8217;s </span><b>Video of the Day</b><span style="font-weight: 400;"> from the </span><a href="https://eurekalert.org/pub_releases/2019-06/tps-nnt062619.php"><span style="font-weight: 400;">Physiological Society &amp; Medical University of Warsaw</span></a><span style="font-weight: 400;"> describes a noninvasive way to test for conditions</span><span style="font-weight: 400;"> such as inflammatory bowel disease (IBD).</span></p>
<p><span style="font-weight: 400;">In 2015, 250,000 people in the UK and 3 million in the United States were diagnosed with IBD. The symptoms include stomach pain and swelling, bloody diarrhea, weight loss, and extreme fatigue.</span></p>
<p><span style="font-weight: 400;">In those with IBD and other intestinal diseases, the intestinal wall allows more bacterial products to pass from the gut into the blood. The test measures he amount of these bacteria in the blood and stool.</span></p>
<p><span style="font-weight: 400;"> &#8212;</span></p>
<p><i><span style="font-weight: 400;">By </span></i><a href="http://csexton@earth.com"><i><span style="font-weight: 400;">Chrissy Sexton</span></i></a><i><span style="font-weight: 400;">, </span></i><a href="https://www.earth.com/staff/"><i><span style="font-weight: 400;">Earth.com</span></i></a><i><span style="font-weight: 400;"> Staff Writer</span></i></p>
<p><i><span style="font-weight: 400;">Video Credit: Physiological Society &amp; Medical University of Warsaw</span></i></p>
<p>&nbsp;</p>

Noninvasive test for inflammatory bowel disease