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

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

We learned that economic growth and environmental protection can and should go hand in hand.

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

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

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

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

The environment is everything that isn't me.

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

You may be able to fool the voters, but not the atmosphere.