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

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

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

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

Never doubt that a small group of thoughtful, committed citizens can change the world indeed, it's the only thing that ever has.

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.

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

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

I can find God in nature, in animals, in birds and the environment.

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