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

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.

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

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.

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.

Compared to coal, which generates almost half the electricity in the United States, natural gas is indeed a cleaner, less polluting fuel. But compared to, say, solar, it's filthy. And of course there is nothing renewable about natural gas.

Although most Americans don't know it, the U.S. gets more oil from Canada than it does from the entire Middle East.