环境保护PPT(英文版)课件.ppt

EnvironmentalProtection

Environmentisthethingsaroundthecenterofthings

ThelawofEnvironmentalProtectionEnvironmentis:air,water,land,minerals,forestsgrasslands,wildlife(野生动植物)aquaticfloraandfauna(水生动植物)historicalsites,scenicareasnaturereserves,residentialareas

Whatishappeningontheeartheverysecond●2.4Neonatesbornintheworld.●extracted28.6tonsofmetal.●produce1.3cars.●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:theEarthsprotectivelayer◆Mainhazards:strongUV(ultra-violetray紫外线)radiationcandamageimmunesystem（免疫系统）ofhumannaturesandanimals,causeskincancerandcataracts（白内障）,damagetotheearth’secosystems（全球生态系统）.NO.2Ozonelayerdepletion

NO.3Lossofbiodiversity1NO.4Thespreadofacidrain2Globalextinctionof50,000species/year,140/dayonaverage.3pH5.6referredasacidrain.Mainhazards:Waterandsoilacidification(酸化),plantandanimaldeath,corrosion(腐蚀)buildings,railwaysandbridgesandotherfacilities.4

NO.5ForestdroppedNO.6Desertification◆Hugenumbersofglobaldeforestation.◆600millionsquarekilometersoflandintodeserteachyear.NO.7Airpollution◆Sulfideandnitrogenoxides(硫化物和氮氧化合物)intotheatmosphereworldwideupto30milliontonseachyear.

NO.8Waterpollution◆About40%oftheworld’sriversareseriouslypolluted.◆Freshwater（淡水）resourcesarebecomingexhausted.NO.9