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Environmentalists say Asian carp, an invasive species of food-guzzling fish, could cause an ecological disaster if it enters Lake Michigan.

"Our ecological footprint - what we take out of the planet - is now 1.3 times the biological capacity of the Earth. In the words of Professor Bob Watson, Defra's chief scientific adviser and former chairman of the Intergovernmental Panel on Climate Change (IPCC), we are in danger of approaching "a point of no return". So the action we take in the... See More next couple of decades will determine whether the stable environment on which human civilization has depended since the last Ice Age 10,000 years ago will continue. "

"Or it could be an ecological disaster, as introducing one species to combat another species often turns out to be. However, after a "detailed" study, scientists are looking at using tiny parasitic wasps as a natural solution to pesticide to protect crops."