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

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.

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

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

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

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

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

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

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

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