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1、Unit4GlobalwarmingWhatcausestheglobalwarming?Humanactivity?Naturalphenomenon?GreenhouseGases?Greenhouse?Greenhouseeffect?Whatarethesemadeof?glassPlantscangrowinitespeciallyduringcoldweatherWhataretheyusedfor?Theglasstrapstheheatfromthesunandkeepsitfromescaping.Thismakesthegreenhouseheatupands
2、otheplantscangrowthroughoutthecoldperiod.HowdoesitworkGreenhouseGases!Greenhouseeffect!Peopleburnsomefossilfuelslikecoal,naturalgasandoiltoproduceenergy,whichcausestheincreaseintheearth’stemperatureSomebyproductsofthisprocess,likecarbondioxide(CO2),methane(CH4),watervapour(H2O),arecalledgreen
3、housegases.Gasesintheatmospheresurroundingtheearth.副產(chǎn)品Greenhousegasesperformthesamefunctionastheglassinagreenhouse.---whensmallamountsofgasesintheatmosphere,likecarbondioxide(CO2),methane(CH4)andwatervapour(H2O),traptheheatfromthesun,andwarmtheearth.Itiscalledthegreenhouseeffect.ReadingTheEar
4、thisBecomingWarmer–ButDoesItMatter?Readthetwographs:WhatarethetwographsaboutGraph2showstheamountofcarbondioxidehasincreasedfrom1957to1997.Graph1showsthetemperaturehasincreasedonedegreeFahrenheitbetween1860to2000.ScanandanswerWhowrotethemagazinearticle?Whatisthenameofthemagazine?2.Whatarethena
5、mesofthethreescientistsmentionedinthearticle?3.Whatisthemaintopicofthearticle?1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?SophieArmstrong,2.Whatarethenamesofthethreescientistsmentionedinthearticle?DrJaniceFoster,EarthCare.CharlesKeeling,GeorgeHambley.3.Whatisthemaintopicoftheartic
6、le?Globalwarming/Theearthisbecomingwarmer.ReadagainandmatchIntroducetheissueofglobalwarmingThecauseoftheearth’sbecomingwarmerThegreenhouseeffectDrJaniceFoster’sideaPuzzlesaboutglobalwarmingDifferentpeoplehavedifferentattitudesP5P6P2P3P4P1Charleskeeling’smeasurementofco2P7Par.1--2.whyistheeart
7、hbecomingwarmer?Itishumanactivitythathascausedthisglobalwarmingratherthanarandombutnaturalphenomenon.1.whatcausestheincreaseintheearth’stemperatureaccordingtothescientists?2.whatisthegreenhouseeffect?3.whendoestheproblemofgreenhouseeffectbegi
