The EPA and its inspector general disagree over what qualifies as a "scientific assessment." The EPA has concluded that greenhouse gases are dangerous; the IG now says that the assessment didn’t go through sufficient peer review. This is actually about the review of the relevant “technical support document,” not about the scientific findings, but tell that to Republicans.

The DOE gave a $737 million loan guarantee to a solar-tower project in Nevada, which had better the hell not fail now.

Motorcycles are more fuel efficient, but their tailpipe emissions contain nasty stuff.

Do China's solar subsidies violate global trade rules? U.S. solar companies say so, although … they would.

Grist thanks its sponsors. Become one.

China’s trying to build an eco-city that people will actually live in. (Previous attempts didn’t go so well on that front.)