When it comes to energy, cost isn't everything - but it's a lot. Everybody wants cheap power.

It may be too late for West Virginia to save itself from the ravages of Big Coal. But it's not too late for America.

Although most Americans don't know it, the U.S. gets more oil from Canada than it does from the entire Middle East.

Nowhere has the political power of coal been more obvious than in presidential campaigns.

Climate scientists have long pointed to the Southwest as one of the places in the U.S. that is most vulnerable to global warming impacts, especially drought. And if there's one thing that even climate denialists don't dispute, dry things burn.

Mark Ruffalo, aka the Incredible Hulk, is the natural gas industry's worst nightmare: a serious, committed activist who is determined to use his star power as a superhero in the hottest movie of the moment to draw attention the environmental and public health risks of fracking.

Bill Gates is a relative newcomer to the fight against global warming, but he's already shifting the debate over climate change.