高二英语Unitampnbsp4ampnbspGlobala

　　unit4globalwarmingreading（教学任务设计）
　　i。revision
　　inconsequencecomeaboutbeopposedtogoupresultinalargequantityof
　　1）withtheuseofelectricity，greatchangeshavenot；not；not；not；inourlife。
　　2）thepolicefounddrugsathishome。
　　3）atfirsttheythescheme，butwemanagedtoarguethemround。
　　4）thepriceofoilhasbyover50percentinlessthanayear。
　　5）itrainedyesterdayandthematchwascanceled。
　　6）thefiercequarrelbothsides’breakingupfromeachother。
　　ii。readingtasks：
　　1）readthetextandthenmatchthemainideaofeachpart。
　　part1（paragraph1）a。listtwodifferentattitudesamongscientiststowards
　　globalwarming
　　part2（paragraphs25）b。itsuptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot。
　　part3（paragraph6）c。illustratehowglobalwarmingcomesabout。
　　part4（paragraph7）d。introduceadebateovertheissueofglobalwarming。
　　2）trytofindoutthemainideaofthetext。
　　thehavedifferentideasonwhetheritwhentheearthisbecoming。
　　3）readthepassageandanswerthefollowingquestions。
　　1。whatdoesthegreenhouseeffectreferto？
　　2。whathasresultedtheincreaseincarbondioxide？
　　3。whowrotethemagazinearticle？whatisthenameofthemagazine？
　　4。whatarethenamesofthethreescientistsmentioned？
　　5。dothescientistsagreewithoneanotherabouttheglobalwarming？
　　6。thedifferentideasbetweendr。janicefosteramp；georgehambley
　　dr。janicefostercarbondioxidehascausedtheglobaltemperatureto。anincreaseoffivedegreeswouldbeaandcouldbe。
　　georgehambleymorecarbondioxideisathing，whichmakes
　　cropsandwillencourage。
　　4）summary
　　allscientists1。totheviewthatitishumanactivitythathascausedtheglobalwarming。thisactivityisburningfossilfuels，toproduceenergy。asaresult，anatural2。calledthegreenhouseeffecthas3。。withoutthisphenomenon，theearthwouldbeabout4。coolerthanitis。so，weneedthosegases。however，theglobaltemperaturewillrisewhenweaddhuge5。ofextracarbondioxideintotheatmosphere。weknowthatthelevelsofcarbondioxidehave6。greatlyoverthelast100to150years。theattitudeofscientiststowardsthisriseiscompletely7。somethinkthatthetrendwouldbeacatastrophewhilesomeare8。tothisview，andtheybelievethatanywarmingwillbe9。withfewbadenvironmental10。。
　　iii。usefulsentencesaboutprotectingenviornment。
　　1。environmentalprotectionhascausedglobalconcernrecently。
　　2。everybodyshouldraisetheawarenessthatit’sourdutytoprotectourmotherearth。
　　3。it’shightimewetookimmediatemeasurestoprotectourearthfrombeingpolluted。
　　4。onnoaccountshouldwedevelopoureconomyatthecostofourenvironment。
　　5。withtheincreaseoftheworldpopulation，ourenvironmentisgettingworseandworse
　　iv。homework
　　writeashortpassageusingthetopicaboutprotectingenvironment。