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1、选修 uni Global Warming,1,Unit 4 Global Warming,选修 uni Global Warming,2,选修 uni Global Warming,3,How did come about?,the snow catastrophe,Some scientists believed that global warming was one of the major reasons why such extreme climate like severe storms and heavy snow frequently came about.,选修 uni Gl
2、obal Warming,4,1. Read the text carefully and sum up the main idea of each part.,2. Read the text fast and answer the questions on page 27 Ex1,选修 uni Global Warming,5,Part one:,( para1 ),Introduce a topic / raise a question,Part two:,( para2-5),Explain how global warming comes about.,Part three:,( p
3、ara6 ),List two different attitudes,Part four:,( para7 ),Draw a conclusion .,The earth is becoming warmer.,Should we do anything?,选修 uni Global Warming,6,Fast Reading,Read the text fast and answer the questions on page 27 Ex1,选修 uni Global Warming,7,Who wrote the magazine article? What is the name o
4、f the magazine? Sophie Armstrong wrote the magazine article. The name of the magazine is Earth Care.,选修 uni Global Warming,8,What are the names of the three scientists mentioned in the article? They are Dr. Janice Foster, Charles Keeling and George Hambley.,选修 uni Global Warming,9,3. What do they th
5、ink about global warming? Do they agree with one another? They dont agree with each other. Dr. Janice Foster thinks the effects of global warming could be very serious.,George Hambley thinks global warming will be mild with few bad environmental consequences.,选修 uni Global Warming,10,4.What are the
6、two graphs about?,Graph 1 shows the temperature increase of one degree Fahrenheit between 1860 to 2000.,Graph 2 shows the carbon dioxide content in the atmosphere from 1957 to 1997.,Graph 1:,Graph 2:,选修 uni Global Warming,11,What is the main topic of the article? Global warming,选修 uni Global Warming
7、,12,Page 27 Ex.2 T or F,1.The temperature in the last century didnt seem to increase much. 2.Everyone believes that global warming is caused by the activities of humans. 3.Janice Foster believes that she can measure the future global rise in temperatrue 4. The rise in carbon dioxide is causing a ste
8、ady in crease in global warming. 5. George Hambley believes scientists are just guessing about the effects of global warming. 6. It is clear what the effects of global warming will be.,T,T,T,T,F,F,选修 uni Global Warming,13,1.The temperature in the last century didnt seem to increase much. 2.Everyone
9、believes that global warming is caused by the activities of humans. 3.Janice Foster believes that she can measure the future global rise in temperatrue,T,T,F,Line 2: it is a rapid increase compared to most natural changes,Line 5 : There is doubt that,选修 uni Global Warming,14,4. The rise in carbon di
10、oxide is causing a steady in crease in global warming. 5. George Hambley believes scientists are just guessing about the effects of global warming.,T,T,6. It is clear what the effects of global warming will be.,Line 45: No one knows,选修 uni Global Warming,15,Summary,The earth is becoming warming and
11、all scientists _ _ the view that the increase in the earths temperature is due to the burning of _ _. Some _ of this process are called _, the most important one of which is _. We need these gases, but the problem begins when we add huge _ extra carbon dioxide into the atmosphere. It means that more
12、 heat energy _ to be trapped in the atmosphere causing the global temperature to _. A scientist called Charles Keeling found that the carbon dioxide in the atmosphere went up from around,subscribe to,fuels,greenhouse gases,byproducts,carbon dioxide,quantities of,tends,go up,fossil,选修 uni Global Warm
13、ing,16,315 parts to around 370 parts _ million in 40 years. All scientists accept the date and agree the burning of more and more fossil fuels has _ this increase. However, the attitude of scientists towards this rise is completely different. On the one hand, Dr. Foster thinks that the _ which incre
14、ases the temperature by 5 degrees would be a _. On the other hand, George Hambley, who _ this view, believe that we should not worry about high levels of carbon dioxide in the air. They predict that any warming will be _ with few bad environmental _. But no one really knows the effects of global war
15、ming.,per,resulted in,trend,catastrophe,are opposed to,mild,consequences,选修 uni Global Warming,17,What we should do to protect our earth?,Discussion:,Its high time that we took immediate measures to protect our earth from being polluted.,选修 uni Global Warming,18,To begin with, we should not throw an
16、y rubbish here and there. Instead, we should pick it up.,选修 uni Global Warming,19,Besides, we are supposed to ban the abuse of plastic bags. Plastic bags can make white pollution, which makes the environment worse and worse.,选修 uni Global Warming,20,Whats more, we should stop factories from producin
17、g harmful gases and water.,选修 uni Global Warming,21,Then we appeal to others to take a bus or bike to go to school or work so as to reduce using private cars which cause air pollution.,选修 uni Global Warming,22,Finally, it is good for us to care about plants. The more plants we have, the better the e
18、nvironment will become.,选修 uni Global Warming,23,To begin with, we should not throw any rubbish here and there. Instead, we should pick it up. Besides, we are supposed to ban the abuse of plastic bags. Plastic bags can make white pollution, which makes the environment worse and worse. Whats more, we
19、 should stop factories from producing harmful gases and water. Then we appeal to others to take a bus or bike to go to school or work so as to reduce using private cars which cause air pollution. Finally, it is good for us to care about plants. The more plants we have, the better the environment will become.,选修 uni Global Warming,24,Lets protect our environment together!,选修 uni Global Warming,25,Thank You !,选修 uni Global Warming,26,此课件下载可自行编辑修改，供参考！ 感谢您的支持，我们努力做得更好！,