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

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.

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

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

I did not become a vegetarian for my health, I did it for the health of the chickens.

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.

People blame their environment. There is only one person to blame - and only one - themselves.

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.