It's not an if - we're going to have to change. Oil is simply going to be gone.
If we were driving pure hydrogen automobiles, that automobile would actually help clean up the air because the air coming out of the exhaust would be cleaner than the air going into the engine intake.
It's fun to be a little bit different in the world, to make a few new trails of your own.
I feel responsible; I feel I've got to do something that will leave the kids a place where they can live healthy, safe, productive, creative and prosperous lives.
The premise is simple: One economy and one environment, and they're interdependent.
We don't have to sacrifice a strong economy for a healthy environment.
We're the only species that have crapped up the planet and the only species that can clean it up.
Practically every environmental problem we have can be traced to our addiction to fossil fuels, primarily oil.
The earth is a tremendous gift. There is nothing else like it in the known universe. I want to leave it the way I found it.