Susan Phillips
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The chemicals, which are linked to health problems, have contaminated drinking water and soil in many parts of the United States. Critics say the EPA is not acting fast enough to limit them.
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Many major airports are on low-lying coastal land where flooding is getting worse. They're building walls, berms and other barriers to try to keep planes and people moving.
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Close to 800,000 records from about a dozen plant collections or "herbaria" are being digitized, allowing researchers broad access to data on plant species collected and preserved in past centuries.
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International shipping sometimes brings unwanted guests: invasive species. The latest invader, the spotted lanternfly, threatens fruit and hardwoods. It's recently spread to Pennsylvania.
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The Environmental Protection Agency is a big target as President Trump aims to cut back the federal budget and workforce. Now some agency employees are organizing to defend the agency's work.
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The Obama-era "Waters of the United States" rule defines which small bodies of water are subject to U.S. authority. Opponents such as farmers, homebuilders and golf course owners say it goes too far.
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President Trump will sign an order on Tuesday that aims to roll back the Obama administration's Waters of the U.S. rule. It applies only to small bodies of water, but it has some big opponents.
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The EPA spent years investigating whether the fracking process pollutes nearby drinking water. To the frustration of many, its final report leaves a lot of questions unanswered.
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Negotiators had hoped the meeting would be the first step in implementing last year's Paris agreement to reduce greenhouse gas emissions. But the U.S. election has cast their plans into doubt.
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Representatives are in Paris hammering out an agreement to cut CO2 emissions. But most of the people charged with preparing cities and towns for the worst impacts of climate change won't be there.