In the U.S. alone, weather disasters caused $50 billion in economic damages in 2010.

Extracting oil from the tar sands is a nasty, polluting, energy-intensive business.

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

Among all the tests President Obama faced in his first term, his biggest failure was climate change.

Geoengineering - the deliberate, large-scale manipulation of the earth's climate to offset global warming - is a nightmare fix for climate change.