Unit4Globalwarming12

Fromthefollowingpictures,youwillknowwhereallthisenergycomesfrom.windmillsacoalpowerstation3anoilrefineryanuclearpowerplant4solarpanelshydro-electricdam5SamplelistsThingsthatuseenergySourcesofenergyRenewable/non-renewablelightheatingcoalnon-renewableoilnon-renewable6televisioncassetteplayervideorecorder

computer

naturalgasnon-renewablewind(windpower)renewablesun(solarenergy)renewableuranium(nuclearenergy)non-renewable

7fridgestovewashingmachinehairdryerwater(hydro-electric)renewableplantwaste(biomassenergy)renewablehotspringsorgeysers(geothermalenergy)renewablethesea(tidalenergy)renewable8Renewableornon-renewable?9Renewableornon-renewable?10Whatistoldinthepicture?1112Whatisthegreenhousemadeandusedfor?13Agreenhouseismadeofglassandisusedforgrowingplants,especiallyduringcoldweather.14Howdoesitwork?

Theairinsideiswarmbecausetheglasstrapstheheatfromthesunandkeepsitfromescaping.Thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod.15Whatarethe“greenhousegases”?

Intheatmospheresurroundingtheearththerearegasescalled“greenhousegases”,includingcarbondioxide,methane(甲烷,沼氣)andwatervapor.16Whatdoyouthinkgreenhousegasesdo?

Theytraptheheatofthesunandkeeptheairsurroundingtheearthwarm.

1718MainideasofeachpartWritingtechniques(Paragraph1)Introduceadebateovertheissueofglobalwarming.Raisingaquestion19MainideasofeachpartWritingtechniques(Paragraphs2---3)Illustratehowglobalwarmingcomesabout.Givingexamples,usinggraphs,explanation.20(Paragraphs4---5)Listtwodifferentattitudesamongscientiststowardsglobalwarming.Givingexamples,makingcontrast.

21(Paragraph6)It’suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.Usingaquestion,leavingreaderstothinkovertheissue.

2223Readthetextcarefullyandfillintheblanks.ScientistsOpinionJaniceFoster◆Weneed______likecarbondioxide,methaneandwatervapour,butifweaddhuge___________extracarbondioxidetotheatmospherebyburningfossilfuels,itwillcausethe________________togoup.gasesquantitiesofglobaltemperature24ScientistsOpinionJaniceFoster◆Overthenext100yearstheamountofwarmingcouldbeaslowas1to1.5degreesCelsius,butitcouldbeashighas5degreesCelsius.◆Anincreaseoffivedegreeswouldbea___________.catastrophe25ScientistsOpinionsGeorgeHambley◆Believesthatweshouldn’tworryabout__________ofcarbondioxideintheair.◆Predictsthatanywarmingwillbemildwithfewbadenvironmental____________.◆______thatmorecarbondioxideisactuallya________thing,whichwillmakelifeforhumanbeingsbetter.highlevelsconsequencesStatespositive26II.Choosethebestanswer.1.Thefirstgraphinthetextisusedto________.attractreaders’attention B.introducethetopicofglobalwarmingC.actasanexample D.supporttheopinionandmakeitmoreconvincing272.Theauthorprobablyagreesthat________.globalwarmingisgoodforus B.wecandonothingaboutglobalwarmingC.catastropheswillhappeniftheglobekeepsonwarmingD.muchremainstobefoundoutabouttheeffectsofglobalwarming2829Answerthequestions.Whowrotethemagazinearticle?Whatisthenameofthemagazine?

SophieArmstrongwrotethemagazinearticle.ThenameofthemagazineisEarthCare.302.Whatarethenamesofthethreescientistsmentionedinthearticle?

TheyareDr.JaniceFoster,CharlesKeelingandGeorgeHambley.313.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?

Therearesomeverydifferentattitudesamongscientiststowardsthisissue.Somethinktheeffectswillbeterrible,whilesomeothersbelievethatweshouldnotworryaboutit.32GraphIshowsthetemperatureincreaseofonedegreeFahrenheitbetween1860to2000.4.Whatarethetwographsabout?33Graph2showsthecarbondioxidecontentintheatmospherefrom1957to1997.345.Whatisthemaintopicofthearticle?

Globalwarming/thewarmingoftheearth.35Thetemperatureinthelastcenturydidnotseemtoincreasemuch.Everyonebelievesthatglobalwarmingiscausedbytheactivitiesofhumans.3.JaniceFosterbelievesthatshecanmeasurethefutureglobalriseintemperature.364.Theriseincarbondioxideiscausingasteadyincreaseinglobalwarming.5.GeorgeHambleybelievesthatglobalwarmingwilldogoodratherthanharmtotheearth.6.Itisclearwhattheeffectsofglobalwarmingwillbe.3738Debate

Instructions●Getintogroupsofsix.Decidewhichthreeinyourgrouparegoingtoagreewiththestatement(GroupA)andwhichthreearegoingtodisagreewiththestatement(GroupB).39●GroupAdiscusswhytheyagreewiththestatement;GroupBdiscusswhytheydisagree.●GroupAandBgettogether.Telleachotherthereasonsforagreeingordisagreeingwiththestatement.40Supplementarymaterialsfordebating

Globalwarming1.Theplanethaswarmedanywherefrom0.5to1.0°C(1to2°F)overthelastcentury.41Thissmallamountmakesahugedifference,causingglacierstomeltand,potentially(潛在的),sealeveltorise.Wecouldseeevenmoreofthisinthefuture,(maybeanother3°C,or5°F)422.Adefinitionofglobalwarmingwouldhavetoincludeameasurable,consistenttemperaturerise,liketheonewehaveseeninrecenthistory.Aquestionremains–Isitanunusualchange?Muchdebateaboutthatone.433.Theearthgetsonekindofenergy(visiblelight)fromthesunandgivesoffanotherkind(infrared紅外線).Thiskindiswhatgetstrappedby“greenhousegases”(GHG’s)intheatmosphere.44Greenhousegases4.Theglobalwarminggreenhouseeffectreallyisabogus(假的)term.Agreenhousekeepswarmbyphysicallytrappingtheairinsideandpreventingconvection(對流).Theatmospherehelpskeeptheplanetwarmbytrappingoutgoingradiationinstead.455.TheleadinggassesareCarbon-dioxide,Methane,Ozone(臭氧)andNitrousOxide(一氧化二氮).Gasanalyzerss