Whatever we'll be forced to do later, we should be doing now.

It's not an if - we're going to have to change. Oil is simply going to be gone.

The premise is simple: One economy and one environment, and they're interdependent.

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.

If we had a hydrogen economy worldwide, every nation on earth could create its own energy source to support its economy, and the threat of war over diminishing resources would just evaporate.

I think there will come a time when civilized people will look back in horror on our generation and the ones that have preceded it; the idea that we should eat other living things running around on four legs, that we should raise them just for the purpose of killing them! The people of the future will say 'meat-eaters' in disgust and regard us in the same way that we regard cannibals and cannibalism.

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.