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1、SavingtheearthLesson34Unit9Earth,AirandWaterBYHUANGSHAOLULakeBaikalDunhuangGebiIndiaMediterraneanSeaGermanyUSAAlskaChinaRussiaEARTHAIRWATERManypartsoftheworldwithlargepopulationandplentyofcropshavebecomedesert.2.Landmaybecomepooriffarmersdonotlimittheircattle.3.Goodsoilisgr
2、aduallylostthesedaysastreesarebeingcutdown.4.Airpollutionandwaterpollutionarethetwocausesofproblemthatmanypartsoftheworldhavebecomedesert.5.Chemicalsinthesmokefrompowerstationscantravelhundredsofmilesbeforefallingdowntotherain.6.Afterabadaccidentatanuclearpowerstation,50%of
3、thetreesinGermanyweredamaged.7.ThewriterusestheexamplesoftheaccidentsinbothIndiaandRussiatoexplainhowwaterispolluted.8.Onceoceansarepolluted,theyarenotabletocleanthemselves.Manypartsoftheworldwithlargepopulationandplentyofcropshavebecomedesert.(T)2.Landmaybecomepooriffarmer
4、sdonotlimittheircattle.(T)3.Goodsoilisgraduallylostthesedaysastreesarebeingcutdown.(T)4.Airpollutionandwaterpollutionarethetwocausesofproblemthatmanypartsoftheworldhavebecomedesert.(F)5.Chemicalsinthesmokefrompowerstationscantravelhundredsofmilesbeforefallingdowntotherain.(
5、F)6.Afterabadaccidentatanuclearpowerstation,50%ofthetreesinGermanyweredamaged.(F)7.ThewriterusestheexamplesoftheaccidentsinbothIndiaandRussiatoexplainhowwaterispolluted.(F)8.Onceoceansarepolluted,theyarenotabletocleanthemselves.(F)PhenomenaCausesSuggestionsEARTHTheareaofdes
6、ertisgrowingeveryyear.Goodsoilisgraduallylost.AIRAirisbeingpolluted.AlotofpeoplediedfrompollutedairinbothRussiaandIndia.Treesintheforestaredestroyedandfishinthelakesarekilled.WATERInsomeplacesit’snolongersafeforswimming,norisitsafetoeatthefish.LakeBaikal,whichusedtobethecle
7、anestintheworld,isnowpolluted.PhenomenaCausesSuggestionsEARTHTheareaofdesertisgrowingeveryyear.Cattleeatgrass.Limitthenumberofthecattle.Goodsoilisgraduallylost.Treesbeingcutdown;strongwindsblowingthevaluablesoilaway.Plantmoretreesandtrytoprotectthem.AIRAirisbeingpolluted.Fa
8、ctries,powerstationsandcarsproducealotofwaste.Alotofthingshavetobedowntoreducepoll
