If the quakes are found to have been caused directly by fracking, not by disposal of fracking wastewater, it would be the first such confirmed case.
In a list of 15 national problems, only race relations is less of a concern for Americans than climate change, according to a new Gallup poll.
The blast was the deadliest of its kind in the U.S. since a natural-gas pipeline exploded in San Bruno, Calif., in 2010, killing eight people.
A new study suggests we've been underestimating the amount of fish in the oceans by a factor of 10 -- but that doesn't mean we get to drive bluefin tuna to extinction.
San Francisco is clearly vying for the title of Most Sustainable City in the United States.
Thirty U.S. senators stayed up all night long on Monday to talk about climate change. Did your senators join in the fun?
Three new CFCs and one new HCFC turned up when no one was looking, but scientists still don't know where these human-made ozone-eaters are coming from.
What could be more American than a gang rivalry between nonrenewable energy and wheat, our nation’s two great loves?
Entrepreneurs are trying out ways to recycle sequestered carbon dioxide, making everything from fertilizer to superglue to Plexiglas.