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.

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

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

Take a course in good water and air and in the eternal youth of Nature you may renew your own. Go quietly, alone no harm will befall you.

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

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

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.