高三英语 Unit22课件 北师大版选修8 课件VIP免费

Lesson1GlobalWarming高二北师大版模块八Unit22EnvironmentalProtectionObjectives■Topractiseusingreportingverbs,e.g.warn,tell,ask,promise.■Topractiseusingvocabularyrelatedtoglobalwarming.■Tolearnaboutthecausesofglobalwarmingandraiseourawarenessofprotectingourglobe.■Totalkabouthowtohelpreducegreenhousegases.PartIWarm-upBriefNews:Copenhagen,September12,2009WorldleadersincludingU.S.PresidentBarackObama,ChinesePremierWenJiabao,addressthegeneralassembly(委员大会)oftheUnitedNationsClimateChangeConference2009inCopenhagenDecember16-18,2009.WorldleadersworkedthroughtheearlyhourstotryandbeataFridaydeadlineforadealoncuttingemissionsandhelpingpoorcountriescopewith(对付)thecostlyimpactofglobalwarming.Mostenvironmentalistsagreethatglobalwarmingisanunnaturalphenomenoncausedbytheemissionsfromburningcarbonfuelssuchascoal,oilandpetrol;theycallthisthe“greenhouseeffect”.TheGreenhouseEffectRaisingtheEarth’stemperaturewillcausesubstantialmeltingofthepolaricecapswhichwillthenleadtoariseinthesealevelandsubsequentfloodingoflow-lyingareas.Globalwarmingwillalsochangecountries’climatesandcausehugefoodandwatershortages.Therehavebeenseveralsummitsofgovernmentstodiscussthisproblembutmanycountriesdon’twanttomakechangestotheirfactoriesandindustrialworksasthiswouldcostthemmoney.Whichcountriesdoyouthinkcontributemoretoglobalwarming?a)developedcountriesb)developingcountriesDevelopedcountries–moreindustryandtechnology.PartIIReadingCanwetaketheheat?Canwetaketheheat?1.Scanthetextbelowforthesewordsandworkouttheirmeanings.consensusbounceagriculturecoincidence•aremarkableconcurrenceofeventsbychance•movequicklyup,back,orawayfromasurfaceafterhitting•ageneralagreement•thescienceorpracticeoffarmingcondemnreservationsacrificeadvocate•theactionofreservingsomething•torecommendorsupportpublicly•togiveup(somethingimportantorvalued)becauseofotherconsiderations•sentencetoaparticularpunishment,especiallydeath1)Themainpurposeofthefirstparagraphis__________.A.tointroducethetopicofglobalwarmingtothereadersB.toremindthereadersofhumanactivitiesinthepastC.tointroducethegreatesttroubleinthefutureD.tomentiontheprocessofglobalwarminginhistory3.Choosethebestanswertoeachquestionaccordingtothetext.Answer:A2)WhichofthefollowingisTRUEaboutgreenhousegases?A.Greenhousegaseswillonlydousharm.B.Greenhousegasesdomoreharmthangoodtohumans.C.Greenhousegasesdomoregoodthanharmtohumans.D.Propergreenhousegasesarequitenecessarytotheearth.Answer:D3)WhichofthefollowingisNOTmentionedastheresultofglobalwarming?A.Typhoons.B.Seriousdiseases.C.Polaricemelting.D.Heatwaves.Answer:A3.Readthetextquicklyandanswerthequestions.1)Whatisglobalwarming?2)Whathumanactivitiesarecausingglobalwarming?GlobalwarmingisanaverageincreaseintheEarth’stemperaturethatleadstoclimatechange.Industry,agriculture,thecuttingdownofforests,theincreaseintransportandtheburningoffuelsarecausingglobalwarming.3)Byhowmuchhastheglobalaveragetemperatureincreasedinthelast10years?4)AregreenhousegasesnecessaryforlifeonEarth?By1°F(onedegreeFahrenheit).Yes,theyare,becausetheytrapheatfromthesunintheEarth’satmosphere.OtherwisetheEarthwouldbecoldandunsuitableforlife.5)Howcanwehelpsolvetheproblemofglobalwarming?Wecanmakesmallchangesliketakingpublictransport,recycling,usinglow-flowshowerheads,andbuyingenergy-efficientlightbulbstohelpstopglobalwarming.PartIIIStructureAnalysis1.Inthelastfewd...