1、What is happening to the earth?air pollutionwater pollutionflooddroughttoo many trees are cut down=deforestationWhich is the main topic in this unit?global warmingWhat is global warming?What caused global warming?What can we do about global warming?hot!Step2:Check Your Preview(key words)1.化石燃料化石燃料2.
2、副产品副产品3.温室效应温室效应1.fossil fuels2.byproduct 3.4.温室气体温室气体5.甲烷，沼气甲烷，沼气6.自然现象自然现象4.greenhouse gases5.methane n.6.Step2:Check Your Preview(useful pharses)1.发生发生;造成造成2.大量的大量的3.上升上升;增长增长;升起升起4.导致导致e about2.quantities of3.go up 4.result in5.同意同意;赞成赞成;订购订购6.6.反对反对7.7.增加，聚集增加，聚集 8.8.继续继续5.subscribe to6.be oppo
3、sed to7.build up 8.keep onStep3:Pre-readingA.The cause of the global warmingB.The phenomenon of the global warmingC.It doesnt matter that the earth is becoming warmerD.Both A and BStep4:Fast Reading(for main idea)Part1c.an introduction of global warmingPart 2Part 3Part 4d.How global warming comes ab
4、out?a.two different attitudes towards global warmingb.whether people should do sth.about global warming(Para_ )(Para_to _)(Para_)(Para_)12567Step5:Careful Reading(for detailed information)1.Who wrote the magazine article?2.What is the name of the magazine?3.Whats the meaning of the word“explore”in L
5、ine.4?A.to examine a problem carefully.B.to answer a problem C.to visit somewherePart1(Para.1):an introductionPart2(Para.2-5):the cause of global warming _ of fossil fuelshuman activity _ gases are produceda natural phenomenon called_ heat from the sunThe earth is _burning greenhouse greenhouse effe
6、ct trap warmedWhat is the cause of global warming?Who is to blame for the global warming?Human activity?Or natural phenomenon?12Part3(Para.6):two different attitudesBad effectsGood effectspessimisticoptimistic 1.the sea level to rise 2.severe storms 风暴风暴 3.floods 4.droughts 干旱干旱 5.famines 饥荒饥荒 6.the
7、 spread of disease 7.the disappearance of species1.make plants grow quicker2.crops will produce more 产量更高产量更高3.a greater range of animals 物种丰富物种丰富4.make life better Janice Foster George Hambley1.Do they draw a conclusion at last?2.The writer probably thinks _.A.It matters.B.It doesnt matter.Part4(Pa
8、ra.7):Does it matter?No It is certain that the earth is becoming warmer,but there are some very different attitudes towards the effects of global warming.Some people think that if global temperature continues going up,it would be a disaster .Global warming would lead to a rise in sea level;others pr
9、edict weather changes like severe storms,droughts,famines,heat waves,and heavy snowstorms,famines,the spread of diseases,and the disappearance of species.On the other hand,there are those who believe more carbon dioxide is actually a good thing.It will make plants grow faster;and encourage a greater
10、 variety of animals.a greater range ofkeeps oncatastropheresult inThere is no doubt thatclimateStep5:Post-reading(consolidation)Replace the underlined expressions with the words,phrases and patterns we have learned in the passage.positiveStep6:Watching and discussing1.What does the video want to tell us?2.According to what we have learned today,what causes global warming?3.What should we do about global warming?paper bagswitch offplastic bagThe green world will return to us!
