If we want to solve climate change, there's no other option.

The president's tweets are baffling experts. Here's a theory about which "bad environmental laws" he's talking about.

The administration says thousands more people will die in traffic accidents if vehicles are forced to become more fuel-efficient.

“Why do I claim that Mr. Pruitt is lying, rather than just deluded?” asked Justin Gillis in a 1,000-word New York Times op-ed eviscerating Scott Pruitt.

The high schoolers' success in changing corporate behavior on guns is a lesson for how to win the fight against global warming.