"A White House climate adviser resigned Wednesday after failing to receive a permanent security clearance, becoming the latest member of the Trump administration to leave amid scrutiny of the background checks of presidential advisers."

"The U.S. military is spending billions to clean up drinking water contaminated with toxic firefighting foam while continuing to use dangerous new formulas."

"How a group of five activists called the Valve Turners decided to fight global warming by doing whatever it takes."

"To ensure that tap water in the United States is safe to drink, the federal government has been steadily tightening the health standards for the nation’s water supplies for decades. But over and over again, local water systems around the country have failed to meet these requirements." An illuminating data visualization maps where the problems are.

"While the Trump administration offered a tepid vision for the future of the Land and Water Conservation Fund in its fiscal 2019 budget proposal — slashing the program's acquisition budget by 95 percent — the Interior Department insisted Secretary Ryan Zinke remains a steadfast supporter."

"Three environmental groups teamed up to sue the Trump administration on Tuesday for allowing oil companies to dump leftover waste from drilling and fracking into the Gulf of Mexico."

"As climate-change lawsuits against the oil industry mount, Exxon Mobil Corp. is taking a bare-knuckle approach rarely seen in legal disputes: It’s going after the lawyers who are suing it."

"The Trump administration wants to eliminate a broad swath of the nation's climate change research infrastructure, including satellites, education programs and science centers."

"Environmental Protection Agency Administrator Scott Pruitt on Tuesday attributed his habit of taking taxpayer-funded, first-class flights to his personal security detail and chief of staff, saying he plays no role in his travel arrangements."

"The Department of Energy allowed millions of dollars slated for a Texas carbon capture project to be used improperly for lobbying, alcohol, travel and "social" expenses, the agency's inspector general said in an audit released today [Tuesday]."