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.

But the "wise" person understands something else— that we are all connected and, therefore, his or her own happiness must include the happiness of others.

When we realize we can make a buck cleaning up the environment, it will be done!

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.

We're the only species that have crapped up the planet and the only species that can clean it up.

Business has to change the way it does business, or we will make no significant changes in the way we relate to the earth.

War is usually fought over diminishing resources, particulary those that we perceive to be extremely valuable.