Capitalism is a cancer in the biosphere.

Our environmental problems originate in the hubris of imagining ourselves as the central nervous system or the brain of nature. We're not the brain, we are a cancer on nature.

Free shackled rivers!...The finest fantasy of eco-warriors in the West is the destruction of [Glen Canyon] Dam and the liberation of the Colorado [River].

An Ice Age is coming and I welcome it as much-needed changing. I see no solution to our ruination of earth except for a drastic reduction of the human population.

The optimum human population of earth is zero.

Humanity is the cancer of nature.

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.