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

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.

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

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

The environment is everything that isn't me.

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

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

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.