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by Richard Ingham and Laurent Banguet Richard Ingham And Laurent Banguet 1 hr 4 mins ago
http://news.yahoo.com/s/afp/20110303/ts_afp/environmentbiodiversityextinction;_ylt=At_KYIFejYvEEo9_5QbC2Vqs0NUE;_ylu=X3oDMTQ3dXFrc3AzBGFzc2V0A2FmcC8yMDExMDMwMy9lbnZpcm9ubWVudGJpb2RpdmVyc2l0eWV4dGluY3Rpb24EY2NvZGUDbW9zdHBvcHVsYXIEY3BvcwMxMARwb3MDNwRwdANob21lX2Nva2UEc2VjA3luX2hlYWRsaW5lX2xpc3QEc2xrA3N0dWR5d29ybGRzcw--
PARIS (AFP) – Mankind may have unleashed the sixth known mass extinction in Earth's history, according to a paper released on Wednesday by the science journal Nature.
Over the past 540 million years, five mega-wipeouts of species have occurred through naturally-induced events.
But the new threat is man-made, inflicted by habitation loss, over-hunting, over-fishing, the spread of germs and viruses and introduced species, and by climate change caused by fossil-fuel greenhouse gases, says the study.