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

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

People blame their environment. There is only one person to blame - and only one - themselves.

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

Harmony with land is like harmony with a friend you cannot cherish his right hand and chop off his left.

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

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

Much of the debate over global warming is predicated on fear, rather than science.

Keep close to Nature's heart... and break clear away, once in awhile, and climb a mountain or spend a week in the woods. Wash your spirit clean.

The only way forward, if we are going to improve the quality of the environment, is to get everybody involved.