课件-人教版选修6-unit4-global-warming知识分享.ppt

;;;Unit 4 Global Warming;Teaching aims:;;Comman?;windmills, renewable.;What? What kind? Renewable?;What? What kind? Renewable?;What? What kind? Renewable?;What? What kind? Renewable?;Greenhouse gases!;reading;True or False? 1.The temperature last century didn’t increase much. 2. Everyone believes that global warming is caused by the activities of humans. 3. Janice Foster believes that global warming is caused by the burning fossil fuels. 4. Natural gas is a greenhouse gas.;5. Carbon dioxide is a byproduct of burning fossil fuels. 6. People accept Charles Keeling’s data because he took accurate measurements.;; 9. George Hambley is worried about the effects of carbon dioxide on plant growth. 10. It is clear what the effects of global warming will be.;;1.Who wrote the magazine article? What is the name of the magazine? ; There are some very different attitudes among scientists towards this issue. Some think the effects will be terrible, while some others believe that we should not worry about it. ; Global warming the warming of the earth;Choices.;2. The author probably agrees that ________ A. actually global warming is good for man.B. we should do nothing about the global warming.C. catastrophes will happen if the globe keeps on warming.D. a lot remains to be found out about the effects of global warming. ;The different ideas between Dr. Janice Foster & George Hambley;Greenhouse gases!;sun;plants;If lack of solar energy, the plants…;;;;;Discussion:;Homework:;Thank you!