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

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

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

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

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.

By polluting clear water with slime you will never find good drinking water.

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

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

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

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