"After Pittsburgh City Council gave final approval Tuesday to a ban on natural-gas production in the city, industry opponents vowed to press for similar prohibitions at the Allegheny County and state levels."

The possibility of producing natural gas from shale formations beneath central Quebec is raising the same debate about its perils and promises as is raging in U.S. states.

Residents of Joliet, Illinois, worry about what coal ash in huge pits will do to their wells -- and their health.

"In a case being followed closely by some Marine veterans and their families, a federal judge has denied the Navy's request to dismiss a civil case regarding an Iowa woman's exposure to contaminated water at Marines Base Camp Lejeune, N.C."

The Great Lakes, America's largest supply of fresh water, and surrounding forests, wetlands, and waterways are threatened by new mining of copper and nickel.

"Canada's lakes and rivers are awash in harmful contaminants, but new documents warn the federal government's murky understanding of the problem is putting the country at risk."

"Arizona Public Service Co. plans to partially close one of the nation's dirtiest coal-fired power generators, the Four Corners Power Plant in New Mexico, company officials said Monday."

Low-income residents of small towns in California's San Joaquin Valley, often Latinos, suffer from unhealthful drinking water caused by the valley's booming agriculture. Now some activists are fighting back.