"The future of life on Earth depends on our willingness to act now."

"I have no doubt that we are on a collision course with disaster if we continue down this path."

"The 'control of nature' is a phrase conceived in arrogance, born of the Neanderthal age of biology and the convenience of man."

"I am haunted by the thought of what we are doing to the earth."

"I am not a scientist in the sense that I wear a white coat and work in a laboratory. I am a writer, and my laboratory is the world around me."