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

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

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

The environment is everything that isn't me.

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

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

Keep close to Nature's heart... and break clear away, once in awhile, and climb a mountain or spend a week in the woods. Wash your spirit clean.

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

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

Local innovation and initiative can help us better understand how to protect our environment.