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

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

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

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

Birds are indicators of the environment. If they are in trouble, we know we'll soon be in trouble.

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

We won't have a society if we destroy the environment.

It seems that every time mankind is given a lot of energy, we go out and wreck something with it.

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

Our world faces a true planetary emergency. I know the phrase sounds shrill, and I know it's a challenge to the moral imagination.