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1、Unit 13,Focus on global warming,Warm-up 1. What do you know about global warming? What is the cause of global warming? 2. What changes could the greenhouse effect create in the Earths climate?3. What can we do to deal with the greenhouse effect?,1.What are some of the environmental problems in today
2、s world?2. What is causing the environmentalproblems? 3. What should we do to protect our environment?,1.What are some of the environmental problems in todays world?,air pollution water pollution forests disappearing/deforestation farmland shrinking noise greenhouse effect,2. What is causing the env
3、ironmentalproblems?,vehicles giving off harmful gases factories emitting gases machines and vehicles making a lot of noise uncontrolled cutting down the trees massive use of fertilizer and pesticide buildings, factories and other facilities occupying farmlands people dumping garbage everywhere,3. Wh
4、at should we do to protect our environment?,spare nature resources prevent waste water from being released from factories recycle make less noise plant more trees make laws to protect our environment use clean energy resources invent new clean materials,Environmental protection organizations,Green P
5、arty,a British political party that aims to protect the environment. It is against the use of nuclear power and other forms of industry and transport which it considers harmful. It was formed in 1973as the Ecology Party, and changed its name to the Green Party in1985.Other countries also have partie
6、s that share the same name and ideals.,a large international pressure group that aims to protect the environment. Its members are well-know for taking direct action and putting their own lives in danger in order to stop people from harming the environment. For example, they often go out in small boa
7、ts to stop people from killing whales or throwing poisonous materials into the sea. a US government organization that established rules and standards for protecting the environment, e.g. against pollution.,Greenpeace:,The Environmental Protection Agency (EPA):,My Thoughts on Environmental Protection
8、,When faced with all kinds of environmental problem, many people seem to believe that we have to _ either economic prosperity or environmental protection. In my view, this is a _ choice. I think that economic development and environmental protection can and must coexist.It is true that development h
9、as _ with it a number of environmental problems, such as air pollution, water _ and acid rain, but at the same time modern industry and commerce have greatly _ our lives. Few would wish to live without the _ of television, automobiles, computers etc. To stop _ our industry and commerce for the sake
10、of nature alone is pure _.Of course, we cant allow economic growth to go on at the _ of the environment, either. When a healthy environment is gone, everything that our life _ on is gone, too. So we must protect the environment not for the sake of environment alone, but for the sake of man.,choose,f
11、alse,brought,shortages,improved,benefits,developing,sentimentalism,expense,depends,Listen to the VOA Special English Environment Report on a study of ozone, and choose the best answer based on the information you hear.,Montreal Protocol 蒙特利尔协议 Chlorofluorocarbons (C-F-C)氯氟碳化合物 coolant 冷冻剂 device 装置
12、stratosphere (气)同温层，最上层,1. What is the function of ozone? A. protect us from radiation from the sun B. use as disinfects (消毒剂) C. purify the air 2. The research was based on the information gathered by _? A. satellites B. equipment on Earth C. Both 3. The findings of the research shows that _.A. los
13、s of ozone slows B. the ozone layer has recovered C. ozone is gained in the atmosphere 4. Which is NOT TRUE about the Montreal Protocol?A. It restricts the use of a number of chemicals which destroy ozone.B. It is an international treaty from 1930s. C. It is working by reducing C-F-C pollution.,scri
14、pt,This is Bob Doughty with the VOA Special English Environment Report. Scientists in the United States have reported some good news about the ozone in the atmosphere. Recent findings suggest that the destruction of ozone by pollution is slowing. Ozone is a form of oxygen. Its presence above Earth p
15、rotects us from radiation from the sun. In one study, researchers examined information gathered by NASA space agency satellites and by equipment on Earth. The findings? In the words of Michael Newchurch of the University of Alabama: “This is the beginning of a recovery of the ozone layer.“ Mister Ne
16、wchurch led the study. He says the atmosphere was losing about eight percent of the ozone layer per ten-year period since the late nineteen-seventies. In the last five years, though, that rate of loss has dropped by half. He says the atmosphere should start to gain ozone before long. He says a full recovery, however, is about fifty years away, as long as the Montreal Protocol remains in place.,
