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

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

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

We don't have to sacrifice a strong economy for a healthy environment.

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

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.

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

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

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