"In many places around Western Pennsylvania residents see clusters of death and clusters of people sickened by cancer or heart and lung diseases. And, like Lee Lasich, a Clairton resident, they're frustrated that government health and environmental agencies don't see them too, don't do something about the problems and don't take a tougher stance on enforcement of air pollution regulations."

"The sprawling green space across from the Catholic church might be Herculaneum's prettiest asset, the kind of inviting place where people could flock to picnic or sling a Frisbee — if potential danger didn't lurk in the grass and ground."

"The storms blew through Hampton Roads on a Thursday in August, and after the storms came runoff, lots of it, shooting off roofs and pavement into storm drains, and a week after the runoff came the red tide. At Ocean View in Norfolk, the waves were mahogany with pale-red caps, stained by a sudden growth spurt of algae."

"Regulators charged with protecting the watershed for New York City and the Philadelphia region today backed off from their toughest restrictions on Marcellus Shale drilling, but still proposed measures stricter than existing rules in nearby areas."

"A university scientist and the federal government say they have found persuasive evidence that oil from the massive Gulf of Mexico spill is settling on the ocean floor."

"Florida filed a lawsuit against the Environmental Protection Agency on Tuesday to block new water pollution controls in the recession-hit state."

A lab downstream of the Alberta oil sands project has been testing Athabasca River water for decades -- but not testing for chemicals that might come from the oil sands.

"The U.S. Environmental Protection Agency issued an emergency order against a gas driller in Texas on Tuesday, accusing the company of contaminating an aquifer and giving it 48 hours to provide clean drinking water to affected residents and begin taking steps to resolve the problem."

"Regulators are finally considering a proposal to clean up Yellowknife's Giant Mine, long one of Canada's worst contaminated sites and Environment Canada's single largest remediation project."