An inert ingredient in the popular weedkiller Roundup has been found to kill human cells.

Two brothers are busting levees to return the Ouachita National Wildlife Refuge to its primeval condition.

"The Gulf of Mexico Fishery Management Council ... left in place a moratorium on longline fishing to aid a federally protected sea turtle species."

"The Pentagon and the defense industry is lobbying the White House to prevent U.S. EPA from tightening a health advisory for a rocket-fuel chemical."

Scientists are forecasting that the pollution-caused 'dead zone' in the Gulf of Mexico this summer could be one of the largest on record.

The House climate bill would cost on average $175 per household, the Congressional Budget Office estimated Friday. Maneuvering to get the bill to the House floor continues.

"The administration is defending in court environmental measures that the president once vowed to roll back. Officials say it is part of a long-term plan, but critics see it as backpedaling."

The U.S. Supreme Court on Monday approved an Army Corps of Engineers permit for the Kensington Mine in Alaska to discharge tailings into a small lake, even though it is likely to kill all the fish.