I believe that human overpopulation is the fundamental problem on Earth Today" and, "We humans have become a disease, the Humanpox

We must all work together in order to save the environment and the world that we live in from further change.

The AIDS epidemic, rather than being a scourge, is a welcome development in the inevitable reduction of human population... If it didn't exist, radical environmentalists would have to invent it.

Capitalism is a cancer in the biosphere.

The human race could go extinct and I for one would not shed any tears.

When a chainsaw rips into a 2,000 year old redwood tree, it's ripping into my guts. When a bulldozer plows through the Amazon rainforest, it's ripping through my side. And when a Japanese whaling ship fires an exploding harpoon into a great whale it's my heart that's being blown to smithereens.

There is no more honorable thing any of us can do with our lives than to work to put part of the world off-limits to the activities of human beings.