英语专业综合教程2unit 13 Focus on global warming.ppt

Unit 13;;;;;;;;;;1.What are some of the environmental problems in today’s world?;2. What is causing the environmental problems?;3. What should we do to protect our environment?;Environmental protection organizations ;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 boats 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.;My Thoughts on Environmental Protection ;;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. loss 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.;script;That is an international treaty from nineteen-eighty-seven to restore the ozone layer. The treaty restricts the use of a number of chemicals that destroy ozone, like chlorofluorocarbons, or C-F-Cs. Wide use of C-F-Cs began in the nineteen-thirties. They became popular coolants in devices such as refrigerators and air conditioners. C-F-Cs remain in the atmosphere for years. Mister Newchurch says the study provides evidence that the Montreal Protocol is working by reducing C-F-C pollution. But the study found the ozone improvement only in the upper stratosphere. The scientists have not yet seen evide