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

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

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

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

I firmly believe that we can have a healthy environment and a sustainable timber industry.

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

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.

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

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