拯救地球课件
日期：2010-05-14 05:38
SavingtheearthLesson34Unit9Earth，50%ofthetreesinGermanyweredamaged7ThewriterusestheexamplesoftheaccidentsinbothIndiaandRussiatoexplainhowwaterispolluted8Onceoceansarepolluted，AirandWater制作：朱凤梅赵秀玲衡水市第二中学LakeBaikalDunhuangGebiIndiaMediterraneanSeaGermanyUSAAlskaChinaRussiaEARTHAIRWATERManypartsoftheworldwithlargepopulationandplentyofcropshavebecomedesert2Landmaybecomepooriffarmersdonotlimittheircattle3Goodsoilisgraduallylostthesedaysastreesarebeingcutdown4Airpollutionandwaterpollutionarethetwocausesofproblemthatmanypartsoftheworldhavebecomedesert5Chemicalsinthesmokefrompowerstationscantravelhundredsofmilesbeforefallingdowntotherain6Afterabadaccidentatanuclearpowerstation，theyarenotabletocleanthemselvesManypartsoftheworldwithlargepopulationandplentyofcropshavebecomedesert(T)2Landmaybecomepooriffarmersdonotlimittheircattle(T)3Goodsoilisgraduallylostthesedaysastreesarebeingcutdown(T)4Airpollutionandwaterpollutionarethetwocausesofprobl，
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