Ethanol doesn't burn cleaner than gasoline, nor is it cheaper.
Nowhere has the political power of coal been more obvious than in presidential campaigns.
Extracting oil from the tar sands is a nasty, polluting, energy-intensive business.
If you think Wall Street firms have it good, you haven't looked closely at Big Oil.
Mark Ruffalo, aka the Incredible Hulk, is the natural gas industry's worst nightmare: a serious, committed activist who is determined to use his star power as a superhero in the hottest movie of the moment to draw attention the environmental and public health risks of fracking.
In the world of energy politics, the sudden vanishing of the word 'coal' is a remarkable and unprecedented event.