science. >> we have had ice ages, meteor impacts that have destroyed up to 90% of all life on the earth. well, another meteorite has just hit the earth called humanity. >> humanity? >> pollution, deforestation. we're talking about losing the natural habitats of many life forms are causing mass extinctions which could accelerate into the future. >> you point to this from 1511 to 2011, thrs what the basis of the study is. 80 mammal species have disappeared over the last 500 years. how are we going to lose 18,000 species that are threatened in the next three to 22 centuries? >> we have lost 1.4% of all plant and animal species on the
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