The only way forward, if we are going to improve the quality of the environment, is to get everybody involved.

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.

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

Take a course in good water and air and in the eternal youth of Nature you may renew your own. Go quietly, alone no harm will befall you.

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

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

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 won't have a society if we destroy the environment.

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