"Kish, the visible form of mill's pollution, 'invaded' homes, leaving residents to worry about health effects."

"The brutally efficient coal-extraction method known as 'longwall mining' has permanently damaged a half dozen streams in Pennsylvania, state regulators have found — a finding that could trigger deeper waves for such operations in the state."

"BALTIMORE, Md. -- Gov. Martin O'Malley has interceded with the U.S. Environmental Protection Agency on behalf of Carnival Cruise Lines after the company threatened to pull its business from Baltimore over a pending air-quality regulation that would require large, ocean-going ships to burn cleaner fuel."

"Trouble in a major Delaware City Refinery unit sent dark smoke billowing from a stack at the plant early [Tuesday] morning, triggering calls to regulators from nearby residents."

"ROCKINGHAM COUNTY, Va. -- Kim Sandum is driving on a one-lane gravel road inside the George Washington National Forest, the largest federally protected forest on the East Coast. She points to a trout stream gurgling over rocks and shallows not 20 feet from her rolling minivan."

"GE Energy Services' coal-fired power plant in Homer City will be required to meet federal standards for emissions of sulfur dioxide that are more protective of human health."

"More than two years ago the Marcellus Shale Coalition, a gas industry trade group, began building an electronic database to house information about the water quality in thousands of private wells across Pennsylvania."

"A freight train smacked into a truck carrying garbage and careened off the tracks in Rosedale Tuesday afternoon, triggering an explosion felt throughout the region and sending up a plume of black smoke visible for miles."