环境保护PPT(英文版)15692

EnvironmentalProtection,Environmentisthethingsaroundthecenterofthings,ThelawofEnvironmentalProtection,Environmentis:air,water,land,minerals,forestsgrasslands,wildlife(野生动植物)aquaticfloraandfauna(水生动植物)historicalsites,scenicareasnaturereserves,residentialareas,Whatishappeningontheeartheverysecond,2.4Nduce1.3cars.CO2emissionsof760tonsworldwide.Decreaseof0.6squarekilometersforest.,Theworldstoptenenvironmentalproblems,1.Globalwarming-全球变暖2.Ozonelayerdepletion-臭氧层破坏3.Lossofbiodiversity-生物多样性减少4.Thespreadofacidrain-酸雨蔓延5.Forestdropped-森林锐减,6.Desertification-土地荒漠化7.Airpollution-大气污染8.Waterpollution-水体污染9.Marinepollution-海洋污染10.Cross-boundarymovementsofpoisonouswastes-毒性废弃物越境转移,NO.1Globalwarming,Graduallyincreasingthegreenhouseeffect,Earthstemperaturerising.Mainhazards(危害):abnormalweather,speciesextinction,thesealevelrising.,Ozone(O3)layer:theEarthsprotectivelayerMainhazards:strongUV(ultra-violetray紫外线)radiationcandamageimmunesystem（免疫系统）ofhumannaturesandanimals,causeskincancerandcataracts（白内障）,damagetotheearthsecosystems（全球生态系统）.,NO.2Ozonelayerdepletion,NO.3Lossofbiodiversity,NO.4Thespreadofacidrain,Globalextinctionof50,000species/year,140/dayonaverage.,pH5.6referredasacidrain.Mainhazards:Waterandsoilacidification(酸化),plantandanimaldeath,corrosion(腐蚀)buildings,railwaysandbridgesandotherfacilities.,NO.5Forestdropped,NO.6Desertification,Hugenumbersofglobaldeforestation.,600millionsquarekilometersoflandintodeserteachyear.,NO.7Airpollution,Sulfideandnitrogenoxides(硫化物和氮氧化合物)intotheatmosphereworldwideupto30milliontonseachyear.,NO.8Waterpollution,About40%oftheworldsriversareseriouslypolluted.Freshwater（淡水）resourcesarebecomingexhausted.,NO.9Marinepollution,NO.10Cross-boundarymovementsofpoisonouswastes,Hundredsoftonsofsiltandwaste(淤泥和废弃物)intothecoastalwater