高中英语 Unit4《Global Warming》课件34 新人教版选修6.ppt

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1、Extensive readingWriting 人教选修人教选修6 Unit 4Global Warming Unit 4Extensive reading on P66Clean up Your Butts and BagsFirst Para.Point of viewSecond Para.First point of the argumentEvidence Third Para.Second point of the argument EvidenceFourth Para.Point of viewRead Toms essay about litter. Make a summ

2、ary for each paragraph, and then fill in the following table.First Para.Point of viewSecond Para.First point of the argumentEvidence Cigarette buts and plastic bags are a serious environmental problem.Butts are small but are still bad for the environment.1.1600 billion cigarettes are smoked each yea

3、r in China. Many of these become litter. 2. 4.5 trillion butts are littered every year in the world.3. Butts are ugly.4. Butts contain toxic chemicals. These get into the water supply. These decrease the quality of the water and endanger living things.5. Butts take up to 5 years to break down, so th

4、e toxic chemicals add up to a great amount.Third Para.Second point of the argument EvidencePlastic bags are a danger to the environment.1.Plastic bags are made from non-renewable resources. If they are not recycled, these resources are lost to us.2.In china, 2 billion plastic bags are used every day

5、.3.Plastic bags last from 20 to 1,000 years in the environment.Fourth Para. Point of viewThe environment would be less polluted if we cleaned up cigarette butts and plastic bags. The best solution would be not to smoke or use plastic bags at all.DiscussionDiscuss the environmental problems that conc

6、ern people most in groups of four. List as many environment topics as possible, then write them on a piece of paper.environment topicsair pollutionnoisesoil erosionwater pollutionlitter classificationdesertificationmake green by planting treesdeforestationwater pollutionair pollutionsoil erosiondese

7、rtificationdeforestationlitter classificationplanting treesChoose a topic from the list that you feel strongly about. Make notes on your topic using headings similar to the table in the reading task. Use the passage as a model.WritingStep 1: Write out the thesis statement. (point of view)Step 2: Wri

8、te out the topic sentence of the first body paragraph.Step 3: Give the supporting points and details about the first subtopic.Step 4: Write out the topic sentence of the second body paragraph.Step 5: Give the supporting points and details about the second subtopic. (more body paragraphs . )Writing t

9、ips The Environmental Effects of Fossil Fuels There is no doubt that fossil fuels bring a lot of good to us. But do you know that many of the environmental problems our country faces today result from our fossil fuel dependence. The environment faces air pollution, global warming, acid rain, and sev

10、eral other very serious problems because of our use of fossil fuels. Over the last 150 years, burning of fossil fuels has resulted in more than 25 percentA sample versionincrease in carbon dioxide in our atmosphere. Carbon dioxide is one of the main factors in global warming which is negatively affe

11、cting everyone. Fossil fuels also affect water pollution, land pollution, and thermal pollution (heat pollution). Coal mining is one of the causes of pollution in the environment. After the mining is completed, the land will remain barren. Materials other than coal are also brought to the surface in

12、 the coal mining process, and these are left as solid wastes.The production, transportation, and use of fossil fuels are to blame for the effects of pollution on the environment. Then what should we do? We should spare no effort to improve our environment. Please save energy and use fewer fossil fuels in our daily lives.HomeworkFinish your composition on environmental problems.See you next time!