"A half dozen coal-fired power plants in Georgia face tougher federal rules that could force them to spend millions of dollars, or even shut down some, to reduce heavy metal pollutants in the state’s rivers and ground water."

"Ohio's environmental regulators are proposing an overhaul of how the state and its cities deal with lead in drinking water, including speeding up notifications when lead is found at the tap."

"Federal biologists on Thursday confirmed the presence of a lethal fungus known as white-nose syndrome in Washington, the first occurrence in western North America of the disease that has killed roughly 7 million bats."

"It was a controversial move when Madison, Wis., decided to replace all its lead pipes in 2001. But that decision put the city ahead of the curve — allowing it to avoid the lead water contamination that is plaguing cities like Flint, Mich., now."

"Hidden beneath Boston lies a vast network of aging iron and steel pipes that leak natural gas from thousands of points under the city. A small number of these leaks emit large volumes of methane, a potent greenhouse gas, while others pose an immediate explosion hazard, according to a recent peer-reviewed study published in the journal Environmental Pollution."

"U.S. health regulators are facing a lawsuit from a coalition of environmental organizations seeking to overturn the government's landmark approval of a type of genetically engineered salmon to be farmed for human consumption."

"President Obama and President Xi Jinping of China said Thursday that they would sign the Paris Agreement on climate change on April 22, the first day the United Nations accord will be open for government signatures."

"Americans trying to kick their soda habit are succeeding, with soda consumption in the U.S. at its lowest level in 30 years, according to a new report."

"MEXICO CITY — Metropolitan authorities on Wednesday temporarily ordered all cars to remain idle one day a week in response to this notoriously smoggy capital's worst air-quality crisis in over a decade."

"The Obama administration on Wednesday announced a new partnership with 41 energy companies that have agreed to voluntarily reduce methane emissions from natural gas operations to help combat climate change."