1、Unit 4 Global Warming,Light our cities Heat our buildings -,1. What do we use energy for?,Many things consume energy in our daily life.,2. Where does all this energy come from?,Wind power,a coal power station,an oil refinery,a nuclear power plant,炼油厂,solar panels,hydro-electric dam,Renewable non-ren
2、ewable:,energy sources,supplies of it never run out,one day they will run out.,Renewable or non-renewable?,Renewable or non-renewable?,Coal Oil Natural gas Uranium,Wind (wind power) Sun (solar energy) Water (hydro-electric power) Plant waste (biomass energy) Hot springs or geysers (geothermal energy
3、) The sea (tidal energy),Fossil fuels,Non-renewable,Renewable,化石燃料,3. What are fossil fuels?,Ancient animal and plant material below the surface of the earth with a high carbon content, such as coal, oil and natural gas, which can be burnt to produce energy. Also known as non-renewable energy becaus
4、e once they are used they have gone forever; they cannot be renewed.,4. What is the greenhouse made and used for?,A greenhouse is made of glass and is used for growing plants, especially during cold weather.,5. How does it work?The air inside is warm because the glass traps the heat from the sun and
5、 keeps it from escaping. This makes the greenhouse heat up and so the plants can grow throughout the cold period.,6. What are the “greenhouse gases”?In the atmosphere surrounding the earth there are gases, which are called “greenhouse gases”, including carbon dioxide, methane(甲烷, 沼气) and water vapor
6、.,7. What do you think greenhouse gases do?They trap heat from the sun and therefore warm the earth.,The Earth Is Becoming Warmer But Does It Matter?,Look at the magazine title quickly and try to find out : how is the text organized?,It has a title; a first paragraph that is in bold; the main text;
7、Diagram(graph); some quotes.,Fast Reading,Read the text fast and answer the questions on page 27 Ex1,Who wrote the magazine article? What is the name of the magazine?Sophie Armstrong wrote the magazine article. The name of the magazine is Earth Care.,What are the names of the three scientists mentio
8、ned in the article?They are Dr. Janice Foster, Charles Keeling and George Hambley.,3. What do they think 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 wa
9、rming will be mild with few bad environmental consequences.,4.What are the 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:,What is the main topic of
10、 the article?Global warming,Careful Reading,Read the text carefully and sum up the main idea of each part.,Part one:,( para1 ),Introduce a topic / raise a question,Part two:,( para2-5),Explain how global warming comes about.,Part three:,( para6 ),List two different attitudes,Part four:,( para7 ),Dra
11、w a conclusion .,1. What is the purpose of the paragraph that is in bold?,To introduce the topic.,To illustrate(阐述) points by providing evidence.,2. What are the diagrams for?,Questionnaires,3. The author probably agrees that _ A. actually global warming is good for man. B. we should do nothing abou
12、t the global warming. C. catastrophes will happen if the globe keeps on warming. D. a lot remains to be found out about the effects of global warming.,4. “But there are some very different attitudes among scientists towards this issue.” “issue“ here means the same as the one in_ . A. I bought the ne
13、w stamp the day of its issue. B. They are talking about one of the key issues in the election campaign. C. The government is expected to issue a statement about the election. D. The magazine has 12 issues each year.,Reading,Read with the tape and finish Part 2 on page 27 True/ false,1. How has the g
14、lobal warming come about? 2. What are the effects of globalwarming?,Careful Reading,Read the text again and answer the questions.,1. How has the global warming come about?,Human activity The burning of fossil fuels,greenhouse gases greenhouse effect,Huge quantities of extra carbon dioxide,(We need t
15、hose gases),2.What are the effects of global warming?, Encourage a greater range of animals.,The sea level to rise., Severe storms, floods, droughts, famines, the spread of diseases, and disappearance of species., Make plants grow quicker. Crops will produce more.,Bad effects:,Good effects:,Of the t
16、wo ideas, which are you in favor of ?,The Dr Janice Fosters.,Why ?,Because we have witnessed a large number of disasters predicted by some people.,tsunami,The sea level to rise.,tornados,Severe storms,droughts,famines,the spread of diseases,destruction of species,Dicussion,What should we do about th
17、e terrible effects above?,.,.,Try to reduce the use of motor vehicles,electric vehicle,bike,running,Solar energy car,Planting trees,Cleaning the rubbish,Using language,What can we do about global warming,1.Who are the writers of the letters?,Ouyang Guang and the editor of Earth Care.,Reading,2.Whats
18、 the purpose of Ouyang Guangs letter?,To get some suggestions for what he can do about global warming.,Read Ouyangs email and answer:,3.What are Ouyang Guangs two concerns?,The first is that he feels that individual cannot have effect on huge environmental problems. The second is that he is not sure
19、 where to start with his project.,5. Does Earth Care agree with Ouyang Guangs opinion that individuals can have little effect?,No, Earth Care doesnt agree.,Read Earth Cares reply and answer:,6.What suggestions does Earth Care give him?,Turn electrical appliances off when not using them.,Dont turn up
20、 the heat, put on more clothes.,Walk or ride a bike, dont drive.,Recycle.,Buy things made from recycled materials.,Buy products that use less energy.,Plant trees.,Talk with family and friends about global warming.,Group Discussion,What else should our government do to slow down global warming?,1.Giv
21、e money to green the surroundings and protect the forests.,2.Encourage people to find and use more renewable energy.,rare plants,rare animals,3.Make laws to protect rare plants and animals .,Return the green world to us,Lets make this world a better place !,Have a nice day. Good bye!,1. on behalf of
22、 代表一方；作为的代言人Id like to thank you on behalf of my family.2. put up with 忍受；容忍= tolerate I dont know how you put up with their endless quarrels.put forward 提出 put off 推迟；延期put out 扑灭；熄灭 put through 接通电话put on 穿上；上演 put down 记下；平定put aside 储存；放在一边,I cannot put up with the toothache. We cant change the
23、bad weather, so we must put up with it. I wont put up with her rudeness any longer!,I cant put up with stress of study,3. advocate vt. 拥护；提倡；主张advocate (doing) sth. 提倡做某事advocate that sb. (should) do 提倡 如： I dont advocate building a factory around our school.People advocate that something (should) b
24、e done to protect the environment.,4.- electrical appliance on so long as you are using it. electric: 电的.电力的 (指产生电的或用电直接产生的或用电操作等) electric generator 发电机 an electric shock 触电 an electric light 电灯 electrical: adj. 与电有关的concerning electricity 概括 总称电器 an electrical engineer. an electrical fault.电力故障 el
25、ectrical equipment/ appliances,5.so long as= as long as conj. 只要, 如果,Its OK to leave an electrical appliance on so long as you are using it.2. 只要你不把书弄脏, 就可以借给你.,只要你在使用电器, 使它处于工作状态是可以的.,You may borrow the book so long as you keep it clean.,Do you have a minute? Ive got something to tell you. OK, _ yo
26、u make it short. A. now that B. if only C. so long as D. every time点拨 now that既然，表示原因；if only是就好了，后面一般用虚拟语气； every time每次，每当，表示时间。,同义词组: on condition that , only if, if providing (that), provided (that),注意: as long as 有时表示 “像那么久”; only if 接从句用于句首,主句主谓语倒装; if only 表达 “要是该多好啊!”需要虚拟语气.,同义表达：,You can go
27、 out on condition that you wear an overcoat. You can go out _ _ _ you wear an overcoat.You can go out _ _ you wear an overcoat.You can go out _ you wear an overcoat.,as/so long as,provided that/ providing that / only if,if / given providing /provided Supposing / suppose,26. circumstance n. (多用复数) 环境
28、；情况in/ under the circumstances 在这种情况下， 既然如此 in/ under no circumstances 绝不，无论如何都不（置于句首时，句子部分倒装）I dont remember all the circumstances of the quarrel.,We have been told that under no circumstances _ the telephone in the office for personal affairs.A. may we use B. we may use C. we could use D. did we u
29、se,常用结构：,There is no doubt that毫无疑问 There is no need to do 没有必要 There is no question 是没有问题的 There is no reason 没有理由 There is no possibility that 是没有可能的 There is no knowing/telling没法知道/说 There is no pointing in doing做没意义 It is a/no wonder that真奇怪/难怪 It is no use/good doing sth,1.Prepare the language points of this passage and underline the important ones. 2.Do the exercise on Page 28.,Homework,
