"Five decades ago, President Lyndon B. Johnson declared the polluted Potomac River a “national disgrace.” Although it is now much cleaner, officials in Washington are still not convinced the water is safe for humans to swim in. But many miles downriver, where the Potomac widens to lakelike proportions as it flows toward the Chesapeake Bay, it teems with a different species of swimmers whose presence may signal healthier waters: dolphins."

"Methane sensors will be put on planes, trucks and atop towers in the West Texas and southeastern New Mexico desert in a new effort to gauge the extent of greenhouse gas emissions from surging oil and natural gas production, advocates with the Environmental Defense Fund announced Wednesday."

"Environmental advocates Oct. 2 claimed that EPA’s coal ash proposals are illegal because companies may be allowed to reuse this material without proper monitoring and public protections."

"The White House refused to meet with two groups of air pollution regulators regarding its rollback of clean car standards, despite holding several meetings with industry advocates."

"A panel of appeals court judges scrapped a Trump-era rule yesterday that it said did not set strong enough restrictions on downwind states' exposure to smog-forming air pollutants produced by upwind neighbors."

"Alaska’s Bristol Bay is a rare pristine salmon fishery. Can it survive a rapidly changing climate—and a massive, Trump-backed mine?"

"A coalition of New England and mid-Atlantic states on Tuesday took a first step toward limiting transportation emissions across 13 states."

"BUTTE, Mont. — The long-awaited discharge of treated wastewater from a former open pit copper mine into Silver Bow Creek in Butte has started with little fanfare."

"An oil spill has contaminated beaches and coastline across eight Brazilian states, the country’s environment agency said on Friday, although authorities are still stumped as to its origin."