Gov. Jerry Brown finally declared an emergency, in the midst of the worst drought in California's history.
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.
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.
Just as importantly, Christiana Figueres says big institutional investors should triple the money they're putting into clean energy.
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.
It has long been thought that young trees are better than old ones at absorbing CO2. A new study suggests the opposite.
Hear those crickets? That’s the sound of The New York Times and other big U.S. papers covering global warming.
State Democrats see a conflict of interest there. They want the pom-poms to change hands.
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.