Richard Ingham and Laurent Banguet
March 6, 2011
Mankind may have unleashed the sixth known mass extinction in Earth’s history, according to a paper released 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.