11恐龙时代以后的最大规模

11.GreatestExtinctionSincetheEndoftheAgeofDinosaurs?Theatmosphereandoceansarenottheonlypartsoftheenvironmentbeingdamaged.Rainforestsarebeingquicklydestroyedaswell,andtheirsurvivalisquestionable.E.O.Wilson,abiologist1atHarvard,calledthedepletion2ofrainforestareas“thegreatestextinction3sincetheendoftheageofdinosaurs4.”Unlikesomeenvironmentalissues,rainforestdepletionhasfortunatelyreceivedsignificantpublicandmediaattention.Despitetheopposition5tothecuttingdown6ofrainforests,theproblemcontinues.Everyyear,Brazilchops7downanareaofforestthesizeofthestateofNebraska.Inadditionto8theAmazonsrainforests,manyotherforestsarebeingcutdownaswell.InIndonesia,Zaire9,Papua-NewGuinea,Malaysia,Burma10,thePhilippines,Peru,Colombia,Bolivia,andVenezuela11,rainforeststhatwereoncegreathavebeenlost.Accordingtosomeestimates,50millionacresofrainforestarecutdownevery