It stands to reason that if you reduce the amount of pollution in an environment, the organisms there will thrive. Now, a study confirms that is happening in rivers in England. According to the research, reducing the amount of metal pollutants like zinc and copper in English rivers led to an increase in the aquatic biodiversity of macroinvertebrates.

As coal and heavy industry have declined, related river pollution also cleared up, allowing more invertebrates to thrive, the study published in Environmental Science & Technology found.

A team led by the UK Centre for Ecology & Hydrology (UKCEH) analyzed over 65,000 observations 1,457 sites from 1989 to 2018 found in the UK Environmental Agency’s data.

In their findings, reduction in metal pollutants had the biggest impact on invertebrate biodiversity, although other pollution reduction, such as sewage, also impacted the variety of invertebrate species. According to the findings, zinc levels below 14 micrograms per liter and copper levels below 3.3 micrograms per liter led to the biggest improvements in species richness.

The authors estimated that metal pollutants and sewage may have declined for multiple reasons, including reduced coal dependence, which would lead to a decline in acid rain that contribute to metal pollution in waterways. Some of the ammonia, organic matter, and other pollutant declines could also be attributed to the 1991 European Urban Wastewater Treatment Directive and improved agricultural practices, according to the study.

With strong evidence that zinc & copper concentrations have the biggest influence on invertebrate species richness, efforts to increase freshwater biodiversity are unlikely to bear fruit without further reductions in these metals, lead author Prof Andrew Johnson said www.ceh.ac.uk/press/biodiv…

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— UK Centre for Ecology & Hydrology (UKCEH) (@ukceh.bsky.social) February 18, 2025 at 8:09 AM

“There is a widespread desire by the public to improve water quality and biodiversity in our rivers but the problem for policymakers is what steps would be most likely to achieve results,” Andrew Johnson, lead author of the study and environmental research scientist at UKCEH, said in a statement. “Our study provides strong evidence that concentrations of zinc and copper have the biggest influence on invertebrate species richness, so future attempts to increase freshwater biodiversity are unlikely to bear fruit without further reductions in these metals.”

The study determined that while river biodiversity improved in the 1980s and 1990s with reduced metal pollution, the species richness has mostly plateaued since 2000, and the authors cited other research that has shown similar trends across North America and Europe.

The authors wrote that more research is needed to determine what urban land cover pollutants most impact biodiversity of invertebrates, and that runoff from urban areas could still contribute to higher levels of zinc and carbon pollution that may not be detected in routine river sampling. Further, the study found that higher levels of metal pollution continue to exist downstream from former mines.

These factors will need to be considered for environmental protection efforts, as the UK’s Department for Environment Food and Rural Affairs (Defra) has set a target to reduce the length of rivers impacted by metal pollutants from mines by half by 2038.

“The way priority chemicals are currently identified for action, ensuring aquatic wildlife may be better protected, could be described as ‘top-down,’” the authors concluded in the study.

“Here, we used a ‘bottom-up’ approach, relying on a statistical analysis of large wildlife and stressor field data sets (consistent monitoring by regulatory agencies being critical to this approach) to identify factors that are most closely associated with biodiversity. We suggest that this approach has considerable merit and at the very least can act as a sense check on the traditional approach.”

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Denise Cheung, the top criminal prosecutor with the United States Attorney’s Office in Washington, DC, resigned on Tuesday after she declined to follow an order from a Trump-appointed superior at the U.S. Environmental Protection Agency (EPA) to start a grand jury investigation, people with knowledge of the matter said, as CNN reported.

Acting U.S. Attorney General Emil Bove initially gave the instruction to Ed Martin — a Donald Trump nominee for U.S. Attorney in DC. — for Cheung to direct an investigation of a Biden EPA funding decision, then freeze the funding.

Cheung, a long-time employee of the Department of Justice, did not feel there was sufficient evidence to comply with the order and was asked to resign.

“Earlier yesterday, I was asked to review documentation supplied by the Office of the Deputy Attorney General to open a criminal investigation into whether a contract had been unlawfully awarded by an executive agency before the change in Administration and to issue grand jury subpoenas pursuant to this investigation,” Cheung wrote in her resignation letter on Tuesday, as seen by CNN.

As Cheung noted in the letter, she and other experienced prosecutors did not believe there was enough evidence to meet the threshold requirements to conduct a grand jury investigation. Bove insisted that the DOJ had met that threshold.

Top US prosecutor quits over pressure to investigate Biden climate spending: Denise Cheung resigns after Trump appointees demand she open grand jury investigation into EPA grants A top federal prosecutor has quit after refusing to launch what she called a politically driven investigation …

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— The Guardian Climate News (unofficial) (@guardian-climate.bsky.social) February 18, 2025 at 5:07 PM

In the resignation letter to Martin, Cheung wrote that she and other prosecutors believed there was insufficient evidence despite senior officials citing an undercover Project Veritas video, reported The Guardian.

“When I explained that the quantum of evidence did not support that action, you stated that you believed that there was sufficient evidence,” Cheung wrote to Martin. “You also accused me about wasting five hours of the day ‘doing nothing’ except trying to get what the FBI and I wanted, but not what you wanted.”

Cheung noted her obligation to follow the law and the code of legal ethics, as well as her sworn oath of office.

“When I started as an AUSA, I took an oath of office to support and defend the Constitution, and I have executed this duty faithfully during my tenure, which has spanned through numerous Administrations,” Cheung wrote in a farewell email to colleagues. “I know that all of the AUSAs in the office continue to honor their oaths on a daily basis, just as I know that you have always conducted yourself with the utmost integrity.”

The dispute originated from a claim by EPA Administrator Lee Zeldin last week regarding $20 billion in EPA funding being held in an account at Citibank.

The funding at issue was earmarked for eight nonprofits in charge of climate change mitigation projects as part of the Inflation Reduction Act.

Zeldin has criticized what he called “rushed” funding for the climate organizations, saying he would attempt to claw back funding in conjunction with the DOJ and return it to the U.S. Treasury Department.

“We will review every penny that has gone out the door. I will be referring this matter to the inspector general’s office, and will work with the Justice Department as well,” Zeldin said, as The Hill reported.

A former official at the EPA who was responsible for implementation of the funding told CNN that it had not been rushed or set up in a nefarious manner.

The EPA and the U.S. Treasury had set up an arrangement with the bank to distribute the funding to the grantees, and while it was the first time that type of agreement was employed by the EPA, it is a process that the Treasury Department had been using for years.

Cheung’s departure comes during a period of upheaval across the DOJ, as prosecutors deemed untrustworthy by the Trump administration are dismissed and the president’s political appointees clash with long-time federal prosecutors.

In her departure email, Cheung encouraged colleagues to “fulfill your commitment to pursuing Justice without fear or prejudice,” as The Hill reported.

I'm leading my colleagues in writing to the DOJ Inspector General after Denise Cheung was forced to resign after defying her Trump-appointed superiors and refusing to freeze climate bank funding in the absence of any crime. You need your climate bank money and we need answers.

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— Senator Ed Markey (@markey.senate.gov) February 19, 2025 at 8:06 PM

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Stronger water management efforts will be essential to overcoming the gap between supply and demand as the planet continues to warm, according to a new analysis by Lorenzo Rosa, principal investigator at Carnegie Science, and Matteo Sangiorgio, a researcher at the Polytechnic University of Milan.

For the study, the pair of researchers quantified issues of water scarcity under 1.5 and three degrees Celsius of global heating above pre-industrial levels, a press release from the Carnegie Institution of Science said.

“Water scarcity is one of the greatest challenges facing humanity this century,” Rosa said in the press release. “About 4 billion people reside and about half the world’s irrigated agriculture is in regions that experience water scarcity for at least one month each year.”

Life on Earth cannot exist without water. It is necessary for human health, food and energy security, environmental resilience, economic development and a wide range of human activities. Even though it is so important, in many places on our planet, demand for water exceeds available supply.

When water consumption is greater than the natural availability of water at any time during a month, it is referred to as a “water gap.” As time goes on, this kind of unsustainable use leads to depleted rivers, lakes, aquifers, groundwater and other natural water reserves.

“Water gaps are already an issue for communities around the world, resulting in either inadequate supplies of water or environmental degradation,” Rosa explained. “And as climate change further disrupts precipitation patterns and alters the water cycle, it will add even more stress.”

Earlier research approached the subject by quantifying groundwater depletion or other reductions in water availability globally, while other studies looked at unsustainable use of water at the regional level.

This study combined the two strategies in order to fully comprehend the scope of the problem and make well-informed water management policies and plans going forward.

“We must be able to balance environmental resilience and the growing need for water in a warming world with a burgeoning population,” Rosa emphasized. “As cities grow, pollution, industrial water use, and irrigation will all increase, which will, in turn, exacerbate the water gap.”

Sangiorgio and Rosa quantified water gaps for scenarios under baseline, 1.5 and 3 degrees Celsius of warming, accounting for factors such as surface and groundwater depletion and water requirements for aquatic ecosystems.

The findings showed that there are already almost 458 billion cubic meters in water gaps annually. They are predicted to grow by 6% under a 1.5 degrees Celsius warming scenario and by 15% if the planet warms by 3 degrees Celsius.

“Even relatively modest increases in the water gap can put pressure on ecosystems and lead to severe shortages for agricultural use, resulting in food insecurity,” Rosa said.

Options to consider for water resources managers and lawmakers in order to increase water supplies include enhancing water storage capabilities by investing in resilient infrastructure, reusing treated wastewater, desalinating saltwater and bringing in water from other areas.

Farmers can prepare for the potential of water scarcity by planting crops that are less water intensive while investing in irrigation technologies that are more efficient.

“While water scarcity can affect entire regions, the most severe consequences are borne by the most vulnerable and impoverished populations, underscoring the important influence of economic and institutional factors in determining water scarcity,” the authors wrote in the study. “Under global warming, this fragile balance between supply and demand is likely to worsen, leading to a future where water resources struggle to meet growing societal and environmental needs. Consequently, many areas face a widening water gap, which threatens not only economic development and societies but also the health of aquatic ecosystems.”

The study, “Global water gaps under future warming levels,” was published in the journal Nature Communications.

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Scientists have found that preservation and restoration for peat swamp forests and mangroves could help lower land-use emissions in Southeast Asia by about 54%. Because the region contributes to about one-third of global land-use carbon emissions, the reduction could also have a big impact globally, with a potential 16% reduction in land-use emissions worldwide.

Peatlands and mangroves account for around 5.4% of land area in Southeast Asia, but they have huge carbon sequestration properties, according to the scientists, who published their findings in the journal Nature Communications. As National University of Singapore (NUS) reported, peatlands and mangroves can sequester around 90% of carbon in the soil. The natural peatland and mangrove ecosystems also promote biodiversity.

Further, the scientists noted that Southeast Asia is home to a significant portion of the world’s tropical peatlands and mangroves, with Brunei, Cambodia, Timor Leste, Indonesia, Laos, Malaysia, Myanmar, the Philippines, Singapore, Thailand and Vietnam accounting for 33% of global mangroves and 39% of global tropical peatlands.

Half of land use carbon emissions in Southeast Asia can be mitigated through peat swamp forest and mangrove conservation and restoration www.nature.com/articles/s41…

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— Ian Hall (@ianhall.bsky.social) February 11, 2025 at 6:40 AM

But with land-use changes, these ecosystems are under threat and risk emitting carbon rather than storing it. According to the Environmental Law Alliance Worldwide, some of the biggest threats to mangroves include coastal development and pollution. As the International Union for Conservation of Nature (IUCN) reported, peatland threats include drainage, burning, agriculture and mining.

“If we conserved and restored the carbon-dense peatlands and mangroves in Southeast Asia, we could mitigate approximately 770 megatonnes of CO2 equivalent (MtCO2e) annually, or nearly double Malaysia’s national greenhouse gas emissions in 2023,” Massimo Lupascu, senior author of the study and associate professor of geography at NUS, said in a statement.

As Mongabay News reported, restoring the peatlands and mangroves that are currently degraded — which includes around 5.34 million hectares (13.4 million acres) drained peatlands and 2.64 million hectares (6.52 million acres) otherwise degraded peatlands — could reduce emissions by around 94 million metric tons of CO2 equivalent per year alone.

Conservation of remaining peatlands should be a major focus. As NUS reported, it is difficult to recover sequestered carbon once the natural peatlands or mangroves have been disturbed by human activities. While restoration will still be important, conserving the remaining ecosystems is critical to reducing land-use emissions.

“These ecosystems pack a climate mitigation punch far beyond their size, offering one of the most scalable and impactful natural solutions to combat the planet’s climate crisis,” said Sigit Sasmito, first author of the study and a researcher at TropWATER at James Cook University.

In addition to prioritizing peatland and mangrove restoration and conservation, the study authors pointed out that these carbon-sequestering ecosystems could also provide economic value, such as through carbon credits, to outweigh the potential economic benefits of land-use changes.

“Wetland soils may have little agronomic value, as it is generally not well-suited for traditional farming or crop cultivation, but they are unmatched in their ability to store and preserve carbon,” Pierre Taillardat, co-author of the study and a principal investigator at Nanyang Technological University (NTU) Singapore’s Wetland Carbon Lab, said in a statement. “If carbon were valued like other critical commodities, such as being traded on the carbon credits market, it could unlock vast opportunities for conservation and restoration projects. This will enable local communities to lead carbon management efforts with a win-win scenario where livelihoods and sustainable ecosystems thrive together.”

It will be important for countries to act quickly on peatland and mangrove preservation and restoration efforts. The UN Environment Programme (UNEP) recently reported that around 500,000 hectares of peatlands are destroyed each year, with East and Southeast Asia particularly affected. Degraded peatlands contribute to around 4% of all global anthropogenic carbon emissions.

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The richest countries in the world are “exporting extinction” by destroying 15 times more biodiversity globally than they do within their own borders, according to a new Princeton University study.

The researchers found that 13.3 percent of biodiversity loss worldwide came from the consumption of high-income countries, a press release from Princeton said.

“Biodiversity loss has accelerated at an alarming rate in recent decades, driven largely by human activities such as clearing forests to grow crops or harvest timber. While countries often degrade ecosystems within their own borders through these activities, they also play a significant role in driving habitat loss overseas by outsourcing agricultural production, i.e., importing food or timber from other countries, thereby leading those other countries to destroy their forests to produce the exports,” the press release said.

The study is the first to quantify the degree of countries’ contributions to worldwide biodiversity loss when they shift the environmental impact of their consumption abroad.

The researchers looked at how 24 high-income countries impacted 7,593 forest-dependent animal species, from mammals and reptiles to birds. They integrated economic trade data with deforestation maps derived from satellites and information on species’ ranges from 2001 to 2015. By integrating the information, they were able to pinpoint severe biodiversity loss “hotspots” and quantify how much of each species’ habitat loss was attributable to the individual country’s imports.

“Tracing the impacts that countries have on the environment outside of their borders is difficult to do,” said lead author of the study Alex Wiebe, a doctoral student in Princeton’s Department of Ecology and Evolutionary Biology, in the press release. “By combining satellite imagery with economic and biodiversity data, we are now able to measure and map exactly where countries impact species around the world for the first time.”

A scarlet-bellied mountain tanager. Alex Wiebe

The findings revealed that deforestation driven by the countries’ imports of crops and timber from beyond their borders caused over 13 percent of range loss for forest-dependent vertebrates worldwide, in addition to domestic biodiversity loss.

Each of these nations caused an average level of biodiversity loss that was 15 times higher than their own domestic impacts. The United States, France, Germany, China and Japan were among the top contributors. Eighteen of the two dozen countries had higher global than domestic effects on biodiversity loss.

“By importing food and timber, these developed nations are essentially exporting extinction,” said David Wilcove, the study’s co-author and a professor of ecology, evolutionary biology and public affairs at Princeton. “Global trade spreads out the environmental impacts of human consumption, in this case prompting the more developed nations to get their food from poorer, more biodiverse nations in the tropics, resulting in the loss of more species.”

The findings also showed that nations tend to have the biggest impact on species living in the nearest tropical regions.

U.S. consumption had the largest effect on Central American wildlife, while consumption by Japan and China strongly impacted Southeast Asia’s rainforest species.

The results also highlighted the harmful impacts international trade has on endangered species. The researchers discovered that over half of the ranges of a quarter of critically endangered species were lost due to international consumption over the course of the study period.

“By increasingly outsourcing their land use, countries have the ability to affect species around the world, even more than within their own borders,” Wiebe explained.  “This represents a major shift in how new threats to wildlife emerge.”

Wilcove highlighted the necessity of collaboration between exporting and importing countries in order to improve habitat conservation and boost the sustainability of trade practices.

”Global trade in food and timber is not going to stop,” Wilcove said. “What’s important is for the importing nations to recognize the environmental impacts this trade has on the exporting countries and to work with those countries to reduce those impacts. All nations stand to benefit by promoting habitat protection and sustainable agriculture because biodiversity benefits all nations.”

The study, “Global biodiversity loss from outsourced deforestation,” was published in the journal Nature.

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