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.

Geoengineering - the deliberate, large-scale manipulation of the earth's climate to offset global warming - is a nightmare fix for climate change.

Climate scientists have long pointed to the Southwest as one of the places in the U.S. that is most vulnerable to global warming impacts, especially drought. And if there's one thing that even climate denialists don't dispute, dry things burn.

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

It's not all Obama's fault: His plans to rebuild America's energy infrastructure have been hampered by the recession, and his efforts on global warming have been stymied by Tea Party wackos and weak-kneed Democrats in Congress.

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

President Obama is in no danger of being judged by history as an eco-radical.