"Residents of parts of the Russian capital Moscow have been urged by the emergencies ministry to stay indoors because of a noxious gas that is spreading through the city."

"BUTTE — The number 5,410 has special meaning to Butte. It’s the critical water level – 5,410 feet above sea level – of the Berkeley Pit. The water in the pit must be kept below that elevation or risk contaminating Silver Bow Creek."

"North Carolina regulators have ordered Duke Energy to resubmit its proposal for assessing the extent of groundwater contamination leaking from 33 coal ash dumps across the state after deeming the company's current plans 'inadequate.'"

"Potash Corp of Saskatchewan Inc agreed to spend more than $52 million on plant improvements and pay a $1.3 million civil penalty to resolve U.S. charges that it violated the Clean Air Act over the emission of harmful pollutants such as sulfur dioxide, U.S. authorities said."

"SPOKANE — Three environmental groups sued a state agency Thursday over the effects of the Northwest’s only commercial nuclear power plant on the water quality of the Columbia River."

"Oil and gas wells across the country are spewing “dangerous" cancer-causing chemicals into the air, according to a new study that further corroborates reports of health problems around hydraulic fracturing sites."

"The pork-loving state faces challenges in protecting water from contamination."

"The nation’s first-ever regulations on the storage and disposal of coal ash have been sent to the White House for final review."

"Climate change has thrown historic rain patterns out of whack. Sanitation departments throughout the Midwest are bracing to keep up with more frequent and intense runoff."