"A government watchdog group on Wednesday requested an investigation into the head of the Environmental Protection Agency’s (EPA) air office, arguing the Trump appointee violated an ethics pledge by meeting with former clients."

"When the Trump administration exempted parts of the Chicago area last year from federal limits on lung-damaging smog, it delivered a huge financial break to steel mills, chemical plants and other industries that are some of the region’s biggest polluters."

"Researchers have found high levels of radiation in giant clams near the Central Pacific site where the United States entombed waste from nuclear testing almost four decades ago, raising concerns the contamination is spreading from the dump site’s tainted groundwater into the ocean and the food chain."

"North Dakota oil drillers are falling far short of the state’s goals to limit the burning of excess natural gas at well heads, five years after the state adopted the rules to reduce the wasteful and environmentally harmful practice."

"A nonprofit that tracks pollution in the Chesapeake Bay lambasted Pennsylvania on Tuesday, saying that the state is failing to protect the nation’s largest estuary from farm manure and dirty stormwater."

"An aggressive push by Congress to pass bipartisan legislation addressing cancer-causing chemicals that are leaching into the water supply is setting the stage for a fight with the Trump administration."

"EPA is considering a change to how oil and gas industry methane emissions are counted that could push them below required reporting levels under the Clean Air Act."

"Newly released emails show that Environmental Protection Agency scientists raised strong objections to a 2018 decision by Scott Pruitt, who was head of the agency at the time, to exempt most of southeastern Wisconsin from federal limits on smog."

"EPA wants to allow perchlorate in drinking water to reach concentrations 10 times higher than standards set by states and three times higher than the agency's own reference level."