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

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

Climate change is a global issue - from the point of view of the Earth's climate, a molecule of CO2 emitted in Bejing is the same as a molecule emitted in Sydney.

Have we failed to slow global warming pollution in part because climate and environmental activists have been too polite and well behaved?

So if you want to know how Exxon Mobil can make $10 billion profit in 90 days, just look around. The whole world was built for them.

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.

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.