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

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

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

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

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

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

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

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

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