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

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

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

Local innovation and initiative can help us better understand how to protect our environment.

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.

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

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

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

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

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