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

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

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.

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

It seems that every time mankind is given a lot of energy, we go out and wreck something with it.

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

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.

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

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