They claim this mother of ours, the Earth, for their own use, and fence their neighbors away from her, and deface her with their buildings and their refuse.

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

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.

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

Never doubt that a small group of thoughtful, committed citizens can change the world indeed, it's the only thing that ever has.

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

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

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

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