北师大版Unit22.Lesson1Global Warming阅读课件.ppt

Write a composition about how can we solve the problem of global warming? (120-150 words) (In your essay, it should include the reasons, the effect and measures of global warming) Homework: * * * * * * Lesson 1 Global Warming Environmental problems? air pollution global warming endangered animals water pollution soil pollution sandstorm forestation noise pollution desertification /b/108435/3369510.html Question: What do you know about global warming? Brainstorming Raising the Earth’s temperature will cause substantial melting of the polar ice caps which will then lead to a rise in the sea level and subsequent flooding of low-lying areas. Global warming will also change countries’ climates and cause huge food and water shortages. Most environmentalists agree that global warming is an unnatural phenomenon caused by the emissions from burning carbon fuels such as coal, oil and petrol; they call this the “greenhouse effect”. There have been several summits of governments to discuss this problem but many countries don’t want to make changes to their factories and industrial works as this would cost them money. Which countries do you think contribute more to global warming? a) developed countries b) developing countries Developed countries – more industry and technology. Part II Pre-reading Can we take the heat? Guessing: Based on the title and the following pictures, can you guess what’s the meaning of the word “take”? Pre-reading Question: What is global warming? Global warming means an average increase in the Earth’s temperature which leads to climate change. While-reading: Skimming Read the text and find main idea of each paragraph. A. Draw readers’ attention to the topic by asking questions. B. What should human beings do. C. What is global warming. D. Consequences of global warming. E. What cause global warming Para 1. Para 2. Para 3. Para 4. Para 5. While-reading: Skimming consensus, bounce, agriculture, coincidence, condemn