There have only been about a half dozen genuinely important events in the four-billion-year saga of life on Earth: single-celled life, multicelled life, differentiation into plants and animals, movement of animals from water to land, and the advent of mammals and consciousness.

We need to figure out how to have the things we love, and not destroy the world.

Nobody wants to buy a $60,000 electric Civic. But people will pay $90,000 for an electric sports car.

As you heat the planet up, it's just like boiling a pot.

My family fears that the Russians will assassinate me.

I'm increasingly inclined to think there should be some regulatory oversight, maybe at the national and international level just to make sure that we don't do something very foolish.

A Prius is not a true hybrid, really. The current Prius is, like, 2 percent electric. It's a gasoline car with slightly better mileage.