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

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

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.

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

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

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

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

When we realize we can make a buck cleaning up the environment, it will be done!

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