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

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

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.

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

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.

Not all is doom and gloom. We are beginning to understand the natural world and are gaining a reverence for life - all life.

Harmony with land is like harmony with a friend you cannot cherish his right hand and chop off his left.

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

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