What's the most unusual response you've gotten to your book or show?
The most unusual response to the book is "$18?!" and to the TV show it's, "That woman's too good for you."
One of the show's themes is that your wife, Rachelle, finds your environmentalism annoying. Does that reflect reality?
It does. She thinks what I do is kind of wacky. At the end of the day she cares about the environment, she's just not quite as zealous as I am. There is friction. It's not put on. But we mostly laugh about it. That's the most important thing. You've got to laugh.
We hear such dire reports about global warming and ice shelves collapsing and predictions of doom. Can we avert disaster?
Yes, if we do something now. People said we couldn't do something about the smog in LA and we did. People said it would be many decades before we turned around the ozone depletion. They said we'd never be able to clean up the Hudson River. Lake Erie was dead. The Cuyahoga River was just going to catch fire. People said the [Berlin] wall was never going to come down, apartheid was never going to end. I don't buy it. I think we can turn this one around too. It's a big one, and I think we can do it.