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

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

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

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.

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

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

The environment is everything that isn't me.

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

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

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