1.Comparedtothepastfewyears,what’stheweatherlikethisyear?2.Doyouwanttocheckitout?Herearesomepicturesbasedontheactuallifescenesintheseyearsforyoutoreferto.Questions第二頁第二頁，共35頁。第三頁第三頁，共35頁。Inaddition,youmayturntoGraph1.onPage26tofindoutthechangesofthetemperaturesfromlong-termaverage.

Conclusion:

Thewholeworldisbecomingwarmerandwarmer.Butdoesitmatter?Thisisthetopictoday.第四頁第四頁，共35頁。Unit4GlobalWarmingReadingTheEarthIsBecomingWarmer–ButDoesItMatter?第五頁第五頁，共35頁。FastReadingGlancequicklyatthemagazinearticleandanswerthequestions.第六頁第六頁，共35頁。

SophieArmstrongwrotethemagazinearticle.Thenameofthemagazineis“Earthcare”.

1.Whowrotethemagazinearticle?2.Whatisthenameofthemagazine?第七頁第七頁，共35頁。Whatisthewritingstyle?A.Expositive(說明文)B.Practical(應(yīng)用文）C.Argumentative(議論文）D.Narrative（記敘文）

★★★第八頁第八頁，共35頁。

CarefulReading1.Readthetextagainandtrytogetthemainideaofthearticle.第九頁第九頁，共35頁。Matchthepartswiththemainideas:Explainhowglobalwarmingcomesabout.

Listtwodifferentattitudesamongscientiststowardsglobalwarming.Introducethetopicofglobalwarming.It’suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.PartI

Part2Part4Part3第十頁第十頁，共35頁。Questions

Howhastheglobalwarmingcomeabout?第十一頁第十一頁，共35頁。①Humanactivityburningoffossilfuels.第十二頁第十二頁，共35頁。②Greenhouseeffectgreenhousegasesweneedthosegases.第十三頁第十三頁，共35頁。Greenhousegases!What’sgreenhousegaseseffect?Greenhousegasestraptheheatofthesunandkeeptheairsurroundingtheearthwarm.Itiscalledthegreenhouseeffect.第十四頁第十四頁，共35頁。③WeaddhugequantitiesofextracarbondioxidetotheatmospherebyburningFossilfuels.Thecarbondioxideintheatmospherewentupfromaround315partspermilliontoaround370partspermillionfrom1957to1997(SeeGraph2onPage26)第十五頁第十五頁，共35頁。ThetwodifferentviewpointstowardstheeffectsofglobalwarmingbetweenDr.JaniceFosterandGeorgeHambley

Dr.JaniceFosterGeorgeHambleyCarbondioxidehascausedtheglobaltemperatureto__________.Anincreaseoffivedegreeswouldbea____________andcouldbe______________.Morecarbondioxideisa__________thing,whichmakescrops_________more_andwillencourage____________________.goupcatastrophe

veryseriouspositiveproduceagreaterrangeofanimals第十六頁第十六頁，共35頁。Ofthetwoideas,whichareyouinfavorof?

TheDrJaniceFoster’s.

Why?Becausewehavewitnessedalargenumberofdisasterspredictedbysomepeople.第十七頁第十七頁，共35頁。

Whataretheeffectsanddisastersofglobalwarming?第十八頁第十八頁，共35頁。What’sworse,theglaciers(冰川）ofthe

SouthPolearebeginningtocrack（破裂）

TheglaciersofthePolesarestartingtomeltduetotheincreasingtemperaturescausedbyglobalwarming.第十九頁第十九頁，共35頁。tsunamiThesealeveltorise.第二十頁第二十頁，共35頁。第二十一頁第二十一頁，共35頁。tornados第二十二頁第二十二頁，共35頁。Severestormsdroughtsfaminesthespreadofdiseases第二十三頁第二十三頁，共35頁。Thedisappearanceofspecies第二十四頁第二十四頁，共35頁。DicussionWhatshouldwedoabouttheterribleeffectsabove?第二十五頁第二十五頁，共35頁。..Trytoreducetheuseofmotorvehicles第二十六頁第二十六頁，共35頁。electricvehiclebikerunningSolarenergycar第二十七頁第二十七頁，共35頁。PlantingtreesCleaningtherubbish第二十八頁第二十八頁，共35頁。疑難句破解并背誦下列句子。Thereisnodoubtthattheearthisbecomingwarmerandthat

itishumanactivitythathascausedthisglobalwarmingratherthanarandombutnaturalphenomenon.

毫無疑問，地球是在變暖，而地球變暖正是人類活動(dòng)導(dǎo)致而成的，并非是一種無規(guī)律的自然現(xiàn)象。第二十九頁第二十九頁，共35頁。Somebyproductsofthisprocessare“greenhouse”gases,themostimportantoneofwhichis,

carbondioxide.這個(gè)升溫過程的一些副產(chǎn)品就叫作“溫室”氣體，其中最重要的就是二氧化碳。第三十頁第三十頁，共35頁。Itmeansthatmoreheatenergytobetrappedintheatmospherecausingtheglobaltemperatureto

goup.這就意味著更多的熱量被困在大氣層中，從而引起全球溫度上升。第三十一頁第三十一頁，共35頁。Even

if

westartreducingtheamountofcarbondioxideandgreenhousegases,theclimateisgoingtokeeponwarmingfordecadesorcenturies.

即使我們開始減少二氧化碳和溫室氣體的含量，在未來幾十年或幾個(gè)世紀(jì)內(nèi)，氣候仍會(huì)持續(xù)轉(zhuǎn)暖。第三十二頁第三十二頁，共35頁。Returnthegreenworldtous第三十三頁第三十三頁，共35頁。Assignment1.Writeanargumentationtitled“EnvironmentP