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.

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

When we try to pick out anything by itself, we find it hitched to everything else in the universe.

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

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

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

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

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

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

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