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

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

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

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

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

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

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

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

I did not become a vegetarian for my health, I did it for the health of the chickens.

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