《高中英语Unit 22 Lesson 1 Global Warming课件1 北师大版 选修》由会员分享，可在线阅读，更多相关《高中英语Unit 22 Lesson 1 Global Warming课件1 北师大版 选修（43页珍藏版）》请在金锄头文库上搜索。
1、1 LESSON1GLOBALWARMING 1GlobalWarming Ingroupsdiscusswhatyouknowaboutglobalwarming Lookatthepicturestogetideas TrafficJam Factory 5 ThegreenhouseeffectistheriseintemperaturethattheEarthexperiencesbecausecertaingasesintheatmosphere watervapor carbondioxide nitrousoxide andmethane forexample trapenerg
2、yfromthesun Withoutthesegases heatwouldescapebackintospaceandEarth saveragetemperaturewouldbeabout60 Fcolder Becauseofhowtheywarmourworld thesegasesarereferredtoasgreenhousegases TheGreenhouseEffect TheGreenhouseEffect 7 Withoutthisgreenhouseheating theEarth saveragetemperaturewouldbeonlyabout 73C 1
3、00F eventheoceanswouldbefrozenundersuchconditions suchastheMoonandtheMars Mars Moon 8 WhatAreGreenhouseGases Somegreenhousegasesoccurnaturallyintheatmosphere whileothersresultfromhumanactivities Naturallyoccuringgreenhousegasesincludewatervapor carbondioxide methane nitrousoxide andozone Certainhuma
4、nactivities however addtothelevelsofmostofthesenaturallyoccurringgases 9 Owingtotheriseinatmosphericcarbondioxidecausedbymodernindustrialsocieties widespreadcombustionoffossilfuels coal oil andnaturalgas thegreenhouseeffectonEarthmaybeintensifiedandlong termclimaticchangesmayresult Whenfacedwiththis
5、question asindividualsshouldrecognizethatcollectivelywecanmakeadifference Whatdifferencecanwemake Individual Takingactiononglobalwarming orclimatechange issimilar Insomecases itonlytakesalittlechangeinlifestyleandbehaviortomakesomebigchangesingreenhousegasreductions Forothertypesofactions thechanges
6、aremoresignificant Whenthatactionismultipliedbythe1 3billionpeopleintheChina Orthe6billionpeopleworldwide thesavingsaresignificant Takingpublictransportlikebusescanreducegreenhousegasemissions AndTakingtraincanalsohelpareductionofgreenhousegas Therecyclingsymbol Buytherecycledproducts Recycledproduc
7、ts Recyclingthebottles Yourglassbottlescouldberecycledintohouseinsulation plasticbottlescouldbemadeintoacosyfleecejacket Paperrecycling yourpapercouldbecomepartofaroadorrace track usinglow flowshowerheads buyingenergy efficientlightbulbs replace with Vocabulary Usetheexpressionsintheboxinthecorrectf
8、ormtocompletethesentences beyondourcontrol pumpinto asaresultof inlargequantities referto speedup1Waterwasthefishpondfromtheriver 2Weallneedtotofinishintime pumpedinto speedup 3Thereisnothingmorewecando thesituationisnow 4theaccident sheisnowafraidofwater 5Thescientistglobalwarmingatleastthreetimesi
9、nhisspeech 6Thefactorywasproducinggreenhousegases beyondourcontrol Asaresultof referredto inlargequantities Grammar Reporting Whatverbsareusedinthetexttoreportthesestatements Example1 toreportthat1HumanbeingsarecausingchangesintheEarth sclimate 2GasespumpedintotheEarth satmosperehavebeenspeedingupth
10、eprocessofglobalwarming toreportthat toclaimthat 5Globalwarmingwillcausedramaticclimatechangesincludingmorefrequentfloods heatwaves anddroughts 3Globalwarmingcouldbeoneofthebiggestenvironmentalproblemsfacingthe21stcentury tobelievethat toinsistthat 4Globalwarmingismostlyduetohumanactivities towarnth
11、at Lookatthesesentencesfromthetextandexplainwhytheunderlinedverbsarenotthesametenseasthereportingverbs 1RecentreportfromtheIPCCwarnedthatglobalwarmingwillcausedramaticclimatechanges 2ScientistfoundthatthetemperatureoftheEarthiscontrolledbygreenhousegases Becauseitisinthefuture Becauseitisageneraltru
12、th Matchthesentenceswithappropriatereportingverbsfromthelist Thenwritethereportedsentences admit boast forbid inquire invite order suggest threaten1We llclosecreditlinesifyoudon treducecarbondioxideemissions Theythreatenedtoclosethecreditlinesifwedon treduceCabondioxideemissions 3Whydon tyoudropinto
13、night 2OK youareright somepoisionouschemicaldidescapeintotheatmospere Theyadmittedthatsomepoisonouschemicalshadescapedintotheatmosphere He She Theyinvitedmetodropintonight He She Theyorderedmetostandupimmediately He She Theyforbadeustouseourdictionariesduringthetest He Sheboastedthathe sheisthebests
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15、lwehaveacupoftea 10usethefollowingverbstoreportthetwodialogues admit advise promise warnTom Idon tthinkyoushouldplaythegametoday John John You reright I mstillalittlebitill butIpromiseIwon toverdoit TomadvisedJohnnottoplaythegametoday JohnadmittedthatTomwasrightbecausehewasalittlebitill Hepromisedno
16、ttooverdoit Tom Becareful IfyouyunaroundtoomuchinthisWeatheryoumaygetanotherattackofthe flu TomwarnedJohntobecarefulbecauseifheranaoundtoomuchintheweatherhemightgetanotherattackoftheflu b accuse beg complain deny explain refuseDaughter Mum please willyoubuymethisCD I vealwayswantedit Mother Sarah youknowIcan taffordit Whydoyoualwaysaskmetobuyyouexpensivethings SarahbeggedhermothertobuyhertheCDbecauseshealwayswantedit Hermotherrefusedandexplainedthatshecouldn taffordit Shecomplainedthatherdaughte
