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

Harmony with land is like harmony with a friend you cannot cherish his right hand and chop off his left.

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

Not all is doom and gloom. We are beginning to understand the natural world and are gaining a reverence for life - all life.

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.

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

The environment is everything that isn't me.

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

I think the cost of energy will come down when we make this transition to renewable energy.