California is now really, truly, officially screwed by drought

Gov. Jerry Brown finally declared an emergency, in the midst of the worst drought in California's history.

Safety rules to prevent oil-train explosions delayed

Freight train operators won't be required to improve the safety of their tankers until next year, but they say they'll take voluntary steps in the meantime.

Big green groups demand an end to Obama’s “all of the above” energy strategy

If the president is serious about climate change, he needs to stop promoting fossil fuels, say the Sierra Club, NRDC, EDF, and 15 other groups.

U.N. climate chief calls for fossil-fuel divestment

Just as importantly, Christiana Figueres says big institutional investors should triple the money they're putting into clean energy.

Pebble Mine near Alaska’s Bristol Bay could be environmentally devastating, EPA says

A huge proposed gold and copper mine would pose major risks to the area's wildlife, fishing industry, and Native cultures, a new report finds.

Older trees best at fighting climate change

It has long been thought that young trees are better than old ones at absorbing CO2. A new study suggests the opposite.

Major newspaper coverage of climate change plummeted last year

Hear those crickets? That’s the sound of The New York Times and other big U.S. papers covering global warming.

North Dakota’s top oil regulator is also its top oil promoter

State Democrats see a conflict of interest there. They want the pom-poms to change hands.

Fungi could help boost crops and slow global warming

Scientists are working to fine-tune and commercialize common fungi as they try to improve crop yields -- efforts that could also help with the climate.