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

When it comes to climate and energy, Gates is a radical consumerist. In his view, energy consumption is good - it just needs to be clean energy.

Obama's record on climate issues is not all bad.

One thing you can say about nuclear power: the people who believe it is the silver bullet for America's energy problems never give up.

When it comes to global warming, coal is the gorilla in the room.

Bloomberg's $50 million is not going to revolutionize the electric power industry. But his willingness to fight is already inspiring others to see Big Coal differently.

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