unit 4 global warming 3.ppt

Is energy important to us? Why? Find out the related energy Find out the related energy Fossil Fuel(矿物燃料) What do Dr. Janice Foster and the scientist George Hambley think about the results of global warming? Do they agree with one another? 2. Does global warming matter? What have you learned from the passage about global warming? It is said that the climate is going to keep on warming for decades or century. Do you think that we should do nothing about it or not? cause the sea level to rise severe storms droughts famines the spread of diseases destruction of species Positive effects Negative effects make plants grow faster crops will produce more a greater range of animals make life better George Hambley Idea-sharing What will global warming bring to us in your opinion? True or false Read the article carefully and finish exercise 2 on page 27 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 burning fossil fuels. F F T p1: … it is a rapid increase compared to most natural changes… P2: … there is fierce debate over it… 4.Natural gas is a greenhouse gas. 5.Carbon dioxide is a byproduct of burning fossil fuels. F T P3: Fossil fuels: coal, natural gas and oil. 6.People accept Charles Keeling’s data because he took accurate measurements. T 7.Flooding could be one of the effects of future global warming. 8.George Hambley believes scientists are just guessing about the effects of global warming. 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. T T F F P10: positive P11: No one knows… P10: speculation 1. What is the purpose of the paragraph that is in bold? To introduce the topic. To illustrate(阐述) points by providing evidence. 2. What are the diagrams for? Third Reading 3. Why are there two