Food for thought

There is a sufficiency in the world for man's need but not for man's
greed. ~Mohandas K. Gandhi

We cannot command Nature except by obeying her. ~Francis Bacon

The activist is not the man who says the river is dirty. The activist
is the man who cleans up the river. ~Ross Perot

When one tugs at a single thing in nature, he finds it attached to the
rest of the world. ~John Muir

The universe is not required to be in perfect harmony with human
ambition. ~Carl Sagan

It appears to be a law that you cannot have a deep sympathy with both
man and nature. ~Henry David Thoreau, Walden, 1854

The human race will be the cancer of the planet. ~Julian Huxley, attributed

The word "wilderness" occurs approximately three hundred times in the
Bible, and all its meanings are derogatory. ~René Dubos, The Wooing
of Earth, 1980

In an underdeveloped country, don't drink the water; in a developed
country, don't breathe the air. ~Changing Times magazine

http://www.quotegarden.com/environment.html