Unit9Savingtheearth课件
日期：2010-07-24 07:11
theyarenotabletocleanthemselves(F)(F)CattleeatgrassLimitthenumberofthecattleTreesbeingcutdown;strongwindsblowingthevaluablesoilawayPlantmoretreesandtrytoprotectthemFactories，Producer:LiuJingPresentationReadingDiscussionGroupWorkEARTHAIRWATER1Manypartsoftheworldwithlargepopulationsandplentyofcropshavebecomedeserts(T)2Landmaybecomepooriffarmersdonotlimittheircattle3Goodsoilisgraduallylostthesedaysastreesarebeingcutdown(T)(T)4Chemicalsinthesmokefrompowerstationscantravelhundredsofmilesbeforefallingdowntotherain(F)5Afterabadaccidentatanuclearpowerstation，50%ofthetreesinGermanyweredamaged6Onceoceansarepolluted，norisitsafetoeatthefishLakeBaikal，powerstationsandcarsproducealotofwasteTherewereseriousaccidentsthatpollutedtheairChemicalrainAlotofthingshavetobedonetoreducepollutionNewlawsshouldbepassedandpeopleshouldrealizehowserioustheproblemisInsomeplacesit’snolongersafeforswimming，whichusedtobethecleanestinthe，
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