ONE of Britain's leading environmentalists will today sound a doomsday warning to the world: humanity's very existence is under threat from climate change and, even if we survive, the population will crash to about a third of its current level.
Sir Crispin Tickell, the man who convinced former prime minister Margaret Thatcher that global warming was a real problem, predicts that, in 200 years, there could be as few as 2.3 billion people because rising sea levels and temperatures will make some areas uninhabitable and, coupled with social factors, depress birth rates.
But he also says our survival is "not guaranteed" and that the presence of humans on the planet could be "no more than a somewhat messy episode in the history of the Earth". Advances in genetics, he believes, could possibly result in the creation of different sub-species of humans, conjuring up the HG Wells nightmare of the Eloi and the Morlocks. Sir Crispin, a former British ambassador to the United Nations who is now chancellor of Kent University and director of the Green College Centre for Environmental Policy and Understanding, is the third major figure in the field this month to sound a warning of massive changes in the years ahead. The others were James Lovelock, who developed the Gaia theory of the planet as a living organism, and Chris Rapley, the director of the British Antarctic Survey.
Sir Crispin, who is due to give a lecture on this subject tonight, said: "The human impact on the Earth has slowly and then rapidly increased, most of all in the last 250 years. "The resulting transformation of the environment is unsustainable. The main factors are human population increase, degradation of land, consumption of resources, water pollution and supply, climate change, destruction of other species ...
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