人教高中英语选修六Unit4 Global warming Reading The earth is becoming warmer课件(19张PPT)

greenhouse effect gases global warming The Earth Is Becoming Warmer -- But Does It Matter? The Earth Is Becoming Warmer Tell the fact about global warming -- But Does It Matter? compare different ideas Read the opening paragraph 1. Who wrote the article? 2.What is the name of the magazine? Skimming 3.What is the topic sentence of the text? So how has this come about and does it matter? The process of how global warming develops and people's different attitudes are declared in the text. 1. Para 2-4 how has this come about Careful reading 1. What is Graph 1 about? The larger the temperature difference, the more heat is transferred. conclusion: the earth is becoming warmer random phenomenon natural phenomenon Careful reading 2. reason? the burning of fossil fuels byproduct greenhouse gases carbon dioxide Para 3 coal natural gas oil Careful reading 3. greenhouse effect? Para 3 Careful reading 4. What's the problem? huge quantities of extra carbon dioxide more heat energy tends to be trapped the global temperature to go up Para 3 Careful reading 1. What is Graph 2 about? Conclusion: the levels of CO2 have increased greatly result in the burning of fossile fuels over the next 100 years as low as 1 to 1.5 degree Celsius as high as 5 degree Celsius 2. Para 2-4 how has this come about different attitudes Careful reading Dr Janice Foster George Hambley The _____ that the temperature increases by five degrees would be a _____ and it could be very _____. trend serious catastrophe Any warming will be ____ with few bad_____. It is actually a _____ thing. mild environmental positive consequences Careful reading catastrophe ? a rise of several meters in the sea level? ? severe storms, floods, famines the spread of diseases disappearance of species Careful reading positive ? encourage a greater range of animals ? make plants grow quicker make crops produce more Careful reading greenhouse gases build up Even if we start ... , the climate is going to keep on warming. Para 6 书本27页 练习2 Title _____ The opening para.: raising a question graph 2 Para 2,3:_____ _____ Para 4,5 _____ Para 6: conclusion graph 1 The earth is becoming warmer -But does it matter? causes Giving examples, using graphs, explanation. different attitudes Discussion We should start from every little bit to fight against global warming.What can we do? walk or ride bikes insteading driving plant trees turn off the lights and fans if not use spread the knowledge of global warming