greenhouse gas emissions

Republicans can be friendly to solar energy -- just don't use the terms "recovery act" or "stimulus package" when lobbying them for government subsidies. That was the message from GOP political adviser Mary Matalin at the largest solar conference in the country on Thursday.

Eight states, New York City and three groups won the legal right to sue greenhouse-gas emitting utilities. The companies appealed to the Supreme Court, and the Obama administration has filed a brief supporting them. Find out the implications of this move.

Carbon offsets are meant to reward companies for cutting their emission of greenhouse gases. But environmentalists claim that some companies are producing extra emissions in order to get paid for destroying it. A U.N. board has halted credits for the projects in question while it investigates.