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In April the EPA established new, legally enforceable limits for PFAS contamination in drinking water. It also set aside another $1 billion to help local governments with cleanup.
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Some otters rely on tools to bust open hard-shelled prey items like snails, and a new study suggests this tool use is helping them to survive as their favorite, easier-to-eat foods disappear.
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The federal government says it will restore grizzly bears to the North Cascades region in Washington state, where they have not been seen since 1996.
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The Energy Department finalized rules that will ban fossil fuels in new and remodeled federal buildings by 2030.
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After studying various species earlier this month, some scientists now say they understand the origin of animal behavior during solar eclipses.
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Fifteen years after the EPA said greenhouse gasses are a danger to public health, the agency finalized rules to limit climate-warming pollution from existing coal and new gas power plants.
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The talks in Canada are not going well,and scientists and civil society groups say the U.S. is largely to blame.
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Climate change is making it harder to meet clean air goals, says the 25th annual State of the Air report from the American Lung Association.
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Critics say the U.S. has been unwilling to push for measures in a global agreement that would drive big cuts in plastic waste.
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Released on Earth Day, the federal government's new "HeatRisk" tool can help people assess when heat goes from uncomfortable to dangerous.
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Another huge patch of seaweed from the Sargasso Sea is floating towards Caribbean and South Florida beaches. Scientists are trying to predict where and when it will reach the shore.
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Novelist Amy Tan's The Backyard Bird Chronicles centers on an array of birds that visit her yard, as Trish O'Kane's Birding to Change the World recalls lessons from birds that galvanized her teaching.