"An unknown amount of oil leaked from BP Plc's Whiting refinery in Indiana into Lake Michigan after a mechanical glitch on Monday afternoon, the company confirmed on Tuesday."

"The Environmental Protection Agency proposed a rule Tuesday that would give the federal government regulatory authority over millions of acres of wetlands and about 2 million miles of streams."

"Air pollution kills about 7 million people worldwide every year, with more than half of the fatalities due to fumes from indoor stoves, according to a new report from the World Health Organization published Tuesday."

"RALEIGH, N.C. -- The lawyer hired to represent North Carolina's environmental agency during a federal investigation into its regulation of Duke Energy's coal ash dumps once represented the utility company in a different criminal probe."

"U.S. authorities expected a 'tapered' re-opening of the Houston Ship Channel, but gave no timeline on Monday of when vessels could start moving again after an oil barge spill shut the waterway for a third day, forcing the nation's second-largest refinery to curb production."

"The federal Environmental Protection Agency will join North Carolina regulators in addressing potential violations of the Clean Water Act at Duke Energy power plants, including a massive spill of toxic coal ash last month in the Dan River, state officials said on Friday."

"TEXAS CITY, Texas -- The cleanup of an unknown amount of thick, sticky oil that spilled into the Galveston Bay blocked the movement Sunday of about 60 ships, including three cruise ships, between the Gulf of Mexico and one of the world's busiest petrochemical transportation waterways."

"America’s largest industrial accident tore apart the town of Kingston, Tennessee. Five years later, has the industry learned anything?"

"CDC review of seven studies involving over 8,000 children suggests a link between childhood leukemia and exposure to high levels of auto exhaust. Direct cause-effect needs more study, researchers say."

"Dark clouds of soot and gases spewed by tractors, bulldozers and backhoes are becoming a thing of the past under new federal standards that have forced cleaner diesel engines this year."