陕西省蓝田县焦岱中学人教版高中英语选修六UNIT 4 GLOBAL WARMING （5） 课件 .ppt

1、Unit 4 Global warming The earth is becoming warmer but does it matter?Learning aims:1)Learn some knowledge about thegreenhouse effect and global warming.2)Know the contents of the text well bytalking about this topic and reading.3)Discuss the problem of global warmingand express your own opinions.Th

2、e natural greenhouse effectmakes the earth _ forhuman beings to live in and it is_ to us.It is the _ greenhouse effect that causes the global temperature to _.suitablebeneficialman-madego upFrom the graph,we can see that during the 20th century the temperature of the earth rose about one degree Fahr

3、enheit.All scientists subscribeto the view that theincrease in the earthstemperature is due to theburning of fossil fuels likecoal,natural gas and oil to produce energy.More such burning means more carbon dioxide added to the atmosphere.Between 1957 and 1997 the carbon dioxide in the atmosphere went

4、 up from around 315 parts to about 370 parts per million.Global warmingRead the text on page 26 to findmore about the two differentviewpoints towards the effects of global warming between Dr.Fosterand George Hambley.Dr.Foster Carbon dioxide has caused theglobal temperature to _.An increase of five d

5、egrees would be a _ and could be very _.go upcatastropheseriousThe sea level to riseThe glaciers of the Poles to meltfloodsSevere stormsdroughtsfaminesthe spread of diseasesthe disappearance of some speciesGeorge HambleyAny warming will be _ with few bad _.More carbon dioxide is a _ thing,which make

6、s crops _ more and will encourage _.positiveproducea greater range of animalsmildenvironmental consequencesDiscuss the statement:We should take immediateaction about globalwarming.(Write down your reasons and your measures on yourlearning sheet.)Assignment:Make up a complete composition ingroups.The passage should includeyour point of view,your reasons andyour measures.Thank you!