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

Bloomberg is famously impatient with beltway politics and believes that to get anything done you need to work from the ground up.

In the world of energy politics, the sudden vanishing of the word 'coal' is a remarkable and unprecedented event.

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

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

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

In the United States, we do a pretty good job of protecting iconic landscapes and postcard views, but the ocean gets no respect.