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

The environment is everything that isn't me.

By polluting clear water with slime you will never find good drinking water.

When we try to pick out anything by itself, we find it hitched to everything else in the universe.

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

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

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

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

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

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