Many of the more radical environmentalists think that people are the problem in global warming and other perceived damage to the environment. Some of the more rational environmentalists don't like to acknowledge that many of the environmentalists want population control. In Australia they are teaching children that they are the problem. I have read about their program several places. Here is something about it from the blog "junkscience."

How long do you deserve to live? - The belief in human-induced global warming, combined with a growing population, has led some environmentalists to question the morality of having children. The suggestion is, more children mean more rapid planetary overheating, as humans engage in the selfish processes of working, playing, eating, using electricity and operating a car. Other people disagree with what they regard as an environmental attack on the human race.

But what about the children who are already here? Do those who believe in human-induced global warming think children should be told that the planet would be better off if they had never been born – that they are planet slayers, so to speak? In fact, the Australian government believes just that, and encourages teachers to tell children when they will have created their fair share of greenhouse gasses according to their current living habits and those of their families – and at what age, therefore, they should die. (Globe and Mail)