In reality, studies show that investments to spur renewable energy and boost energy efficiency generate far more jobs than oil and coal.

Coal boosters like to tout coal as cheap and plentiful - well, not anymore. At least not in China.

Compared to coal, which generates almost half the electricity in the United States, natural gas is indeed a cleaner, less polluting fuel. But compared to, say, solar, it's filthy. And of course there is nothing renewable about natural gas.

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

In the Arctic, things are already getting freaky. Temperatures have warmed three times faster than the global average.

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

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