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

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.

Some studies suggest that the Arctic Ocean may be ice-free by the end of the century.

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

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

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

One of the big questions in the climate change debate: Are humans any smarter than frogs in a pot? If you put a frog in a pot and slowly turn up the heat, it won't jump out. Instead, it will enjoy the nice warm bath until it is cooked to death. We humans seem to be doing pretty much the same thing.