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1、Unit 4,Global warming - Does it matter,预习检测,I. Enjoy translation try to sleep in spite of the noise. Dont get into the habit of smoking. I think his success was due to his healthy life. Have you decided on going to America for further education?,II. Skim the passage on page 26-27 tofind the bold (黑体
2、字) word or phrase that can complete the blanks.,1. are opposed to 2. subscribed to 3. compared to 4. came about 5. states 6. even if 7. quantities of 8. kept on 9. build up 10. result in,Fast reading,What is mainly discussed in the text ? A. Carbon dioxide B. Water vapour C. Gases in the atmosphere
3、D. Temperature increase,According to the text, which of the following statement is not true？ A. Carbon dioxide is a byproduct of the burning of fossil fuels B. All the scientists agree that the burning of more and more fossil fuels leads to the increase of carbon dioxide C. If we stop adding carbon
4、dioxide and other greenhouse gases from now on, the temperature will stop going up D. It is still not clear what the effect of global warming will be.,George Hambley thinks that more carbon dioxide _ A. may lead to a catastrophe B. will do good rather than harm to the earth C. will cause the spread
5、of diseases D. will encourage a greater range of animals, thus threatening human beings.,By asking the two questions at the end of the article, the writer implies that _ A. we can do nothing about global warming B. global warming is caused by human beings C. we should not be too worried about global
6、 warming D. human beings still have more worries about the effect of global warming,What will happen if we do nothing about global warming? A. It would cause the sea level to rise, storms, droughts, famines and so on B. The temperature will be surely lower C. It doesnt matter D. It has nothing to do
7、 with me.,Deep-reading,1. How has the global warming come about? 成果展示：_ _ _,Human activity,Greenhouse effect- greenhouse gases,Huge quantities of extra carbon dioxide-from 1957 to 1997-from around 315 parts per million to around 370 parts per million.,2. What are the effects of global warming? 成果展示：
8、 _ _,The sea level to rise.,Severe storms, droughts, famines, the spread of diseases, and destruction of species.,Make plants grow faster. Crops will produce more. Encourage a greater range of animals.,III . The different ideas between Dr. Janice Foster & George Hambley,catastrophe,rise,flood,Disapp
9、earance of species,mild,consequence,positive,IV. divide the passage into 4 parts and match the main idea of each part.,(1)llustrate how global warming comes about (2)List two different attitudes among scientists towards global warming (3)Introduce a debate over the issue of global warming (4)Its up
10、to readers to think and decide whether people should do sth about global warming or not,Part1 (para.1),Part2(para.2-5),Part3(para.6),Part4(para.7),Wind energy is used as power to produce electricity .,Windmills,where electricity is produced by burning coals.,The coal power stations,in which oil is r
11、efined and made pure.,The Oil Refineries,a facility designed to convert nuclear energy into electricity.,A nuclear power plant,on the roof of a house on a bright sunny day are used to collect solar energy, making your house warm or heating your water.,Solar panels,are used to keep back water and rai
12、se its level for irrigation or for producing electricity, etc.,The Hydro-electric dams,How does it work?,The glass traps the heat from the sun, making the air warm so that plants can grow better.,Step V Summary,The earth is becoming warming and all scientists _ _ the view that the increase in the ea
13、rths temperature is due to the burning of fossil _. Some _ of this process are called _ gases, 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 heat energy _ to be trapped in the atmosphe
14、re 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,byproducts,carbon dioxide,quantities of,tends,go up,315 parts to around 370 parts _ million in 40 years. All scientists accept
15、the date and agree the burning or more and more fossil fuels that has _ this increase. However, the attitude of scientists towards this rise is completely different. On the one hand, Dr. Foster thinks that the _ which increases the temperature by 5 degrees would be a _. On the other hand, George Hambley, who are _ this view, believe that we should not worry about high levels of carbon dioxide in the air. They predict that any warming will
