You may be able to fool the voters, but not the atmosphere.

The environment is everything that isn't me.

I have a private plane. But I fly commercial when I go to environmental conferences.

I did not become a vegetarian for my health, I did it for the health of the chickens.

If we do not permit the earth to produce beauty and joy, it will in the end not produce food, either.

Not all is doom and gloom. We are beginning to understand the natural world and are gaining a reverence for life - all life.

I think the cost of energy will come down when we make this transition to renewable energy.

We learned that economic growth and environmental protection can and should go hand in hand.

No one should be able to enter a wilderness by mechanical means.

Unless we keep this planet healthy, everything else is for naught.