The year is off to a bad start for purveyors of the dirtiest fossil fuel on earth.
The president has talked about climate change in every annual address, and you can bet that he'll do it again tonight.
New research quantifies the devastating impact of extreme weather on essential crops.
The suit follows up on the EPA's allegations that VW installed illegal software to cheat on emissions tests.
The deal is far from an ultimate solution to climate change, but it represents unprecedented progress.
Tension is rising between the United States and China as the deadline for a climate deal approaches.
Negotiators just took a big step forward in the fight against global warming.
After just a few days, billions of dollars have been committed to clean energy.
Sometimes taking a plane is actually more fuel-efficient than driving, research shows.