"Childbearing should be a punishable crime against society, unless the parents hold a government license. All potential parents should be required to use contraceptive chemicals, the government issuing antidotes to citizens chosen for childbearing." - David Brower, first Executive Director of the Sierra Club
"I suspect that eradicating small pox was wrong. It played an important part in balancing ecosystems." - John Davis, editor of Earth First! Journal "The extinction of the human species may not only be inevitable but a good thing." - Christopher Manes, Earth First!
"If I were reincarnated I would wish to be returned to earth as a killer virus to lower human population levels." - Prince Philip, Duke of Edinburgh, patron of the World Wildlife Fund
"One America burdens the earth much more than twenty Bangladeshes. This is a terrible thing to say. In order to stabilize world population,we must eliminate 350,000 people per day. It is a horrible thing to say, but it's just as bad not to say it." - Jacques Cousteau, UNESCO Courier
"Giving society cheap, abundant energy would be the equivalent of giving an idiot child a machine gun." - Prof Paul Ehrlich, Stanford University
"Global Sustainability requires the deliberate quest of poverty, reduced resource consumption and set levels of mortality control." - Professor Maurice King
"The only hope for the world is to make sure there is not another United States. We can't let other countries have the same number of cars, the amount of industrialization, we have in the US. We have to stop these Third World countries right where they are." - Michael Oppenheimer, Environmental Defense Fund
"Isn't the only hope for the planet that the industrialized civilizations collapse? Isn't it our responsiblity to bring that about?" - Maurice Strong, founder of the UN Environment Programme
"If we don't overthrow capitalism, we don't have a chance of saving the world ecologically. I think it is possible to have an ecologically sound society under socialism. I don't think it is possible under capitalism" - Judi Bari, principal organiser of Earth First!
"Humanity is sitting on a time bomb. If the vast majority of the world's scientists are right, we have just ten years to avert a major catastrophe that could send our entire planet's climate system into a tail-spin of epic destruction involving extreme weather, floods, droughts, epidemics and killer heat waves beyond anything we have ever experienced - a catastrophe of our own making." - Al Gore, An Inconvenient Truth, 2006