Some studies have shown that natural gas could, in fact, be worse for the climate than coal.

Extracting oil from the tar sands is a nasty, polluting, energy-intensive business.

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.

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

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

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.

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.