"It is a wholesome and necessary thing for us to turn again to the earth and in the contemplation of her beauties to know the sense of wonder and humility."

"The true meaning of conservation is to protect the earth's resources for future generations."

"What is the use of a house if you haven't got a tolerable planet to put it on?"

"It is not my intention to create hysteria, but to awaken people to the dangers that exist."

"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."