英语：Unit4《Globalwarming》warmingup课件（新人教版选修6）.ppt

Unit 4;Words review;1. consume energy 2. greenhouse 3. greenhouse gases 4. the greenhouse effect 5. degree Fahrenheit 6. degree Celsius 7. atmosphere 8. fossil fuel 9. carbon dioxide 10. renewable source 11. non-renewable source 12. Natural resources;What causes the global warming? Human activity or a random but natural phenomenon?;;Things that use energy around us or at any other places:;Where does the energy come from?;energy sources; Fossil fuel(化石燃料): 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 because once they are used they have gone forever; they cannot be renewed. ;Carbon dioxide;;_____ the heat from the sun;In the atmosphere surrounding the earth there are gases, which are called “greenhouse gases”.;What do you think greenhouse gases do?;The earth is becoming warmer - ;What is mainly discussed in the passage?A. What has caused the global warming and whether it matters.B. What effects of the global warming will be.C. How serious the global warming could be.D. What the global warming is.;Skimming;Skimming;Skimming;Skimming;Reading Comprehension III;3. Janice Foster believes that she can measure the future global rise in temperature. 4. The rise in carbon dioxide is causing a steady increase in global warming. 5. George Hambley believes that global warming will do good rather than harm to the earth. 6. It is clear what the effects of global warming will be.;;Part 1.(para1) raise a question Part II Para2. who is to blame for the earth’s becoming warmer? ; Para 3 How do human affect the earth warming up? ;Para 4. the levels of carbon dioxide have increased greatly over the last 100 to 150 years;Tip: You can know somebody’s opinion through understanding his or what he said. ;Dr. Janice Foster thinks the effects of global