Unit4Reading人教版book6

Unit4GlobalWarmingPre-reading:Whatisgreenhouse?Whatisgreenhouseeffect?Whatisgreenhousegases?Howdoesgreenhousework?Agreenhouseismadeofglassandisusedforgrowingplantsthroughoutthecoldweather.Theglasstrapstheheatfromthesunandkeepsitfromescaping.Theatmospheresurroundstheearthandcontaincertaingasesinit.Thegasesarecalledgreenhousegaseswhichalsotraptheheatfromthesunandkeeptheearthwarm.GreenhouseAtmosphereReadingTheearthisbecomingwarmer——Butdoesitmatter?ConstructMainideasofeachpartPart1(1)Introduceadebateovertheissueofglobalwarming.Part2(2-5)Howglobalwarmingcomesabout.Part3(6)Listtwodifferentattitudesamongscientiststowardsglobalwarming.Part4(7)It'suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.Readthepassagecarefullyandjudgewhetherthestatementsaretrueorfalse?1.Thetemperatureinthelastcenturydidnotseemtoincreasemuch.2.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.3.JaniceFosterbelievesthatshecanmeasurethefutureglobalriseintemperature.FTT4.Theriseincarbondioxideiscausingasteadyincreaseinglobalwarming.5.GeorgeHambleybelievesthatglobalwarmingwilldogoodratherthanharmtotheearth.6.Itisclearwhattheeffectsofglobalwarmingwillbe.TTFThedifferentideasbetweenDr.JaniceFoster&GeorgeHambleyDr.JaniceFosterGeorgeHambleyCarbondioxidehascausedtheglobaltemperatureto__________.Anincreaseoffivedegreeswouldbea____________andcouldbe______________.Morecarbondioxideisa__________thing,whichmakescrops____________andwillencourage____________________________.goupcatastropheveryseriouspositiveproducemoreagreaterrangeofanimalsA:Weshalldosomethingaboutglobalwarming.B:Weshalldonothingaboutglobalwarming.DebateSeeyou…