Warming up1.Things that use energy2. Sources of energy3.Renewable / non-renewable 高二 Book 6Unit 4 Global warmingMake a list of1.Things that use energy:2. Sources of energylightheatingfridgestove washing machinehairdryertelevision cassette player video recorder computer coaloilnatural gaswind (wind power)sun (solar energy)uranium (nuclear energy)water( hydro- electric)the sea (tidal energy)3.Renewable / non-renewableRenewable EnergyRenewable energy sources, such as the sun, wind, rain, and plant matter, naturally and continually “renew“ themselves. Renewable or non- renewable?Renewable or non- renewable?Pre-reading1.What is the greenhouse made of and used for?2. How does it work?3. What are the “greenhouse gases”? 4. What do you think greenhouse gases do?What is the greenhouse made of and used for?A greenhouse is made of glass and is used for growing plants, especially during cold weather. How does it work?The air inside is warm because the glass traps the heat from the sun and keeps it from escaping. This makes the greenhouse heat up and so the plants can grow throughout the cold period. What are the “greenhouse gases”?In the atmosphere surrounding the earth there are gases, which are called “greenhouse gases”, including carbon dioxide, methane(甲烷, 沼气) and water vapor. What do you think greenhousegases do?They trap heat from the sun and therefore warm the earth.Main ideas of each part Writing techniques( Paragraph 1 )Introduce a debate over the issue of global warming. Raising a questionReading Main ideas of each part Writing techniques(Paragraphs 2-3 )Illustrate how global warming comes about.Giving examples, using graphs, explanation. (Paragraphs 4-5 ) List two different attitudes among scientists towards global warming.Giving examples, making contrast. (Paragraph 6 ) Its up to readers to think and decide whether people should do something about global warming or not.Using a question, leaving readers to think over the issue. Read the text carefully and fill in the blanks.Scientists Opinion Janice Foster We need 1_ like carbon dioxide, methane and water vapour, but if we add huge 2_ extra carbon dioxide to the atmosphere by burning fossil fuels, it will cause the 3_ to go up.gasesquantities ofglobal temperatureScientists Opinion Janice Foster Over the next 100 years the amount of warming could be as low as 1 to 1.5 degrees Celsius, but it could be as high as 5 degrees Celsius. An increase of five degrees would be a 4_ . catastropheScientists Opinions George Hambley Believes that we shouldnt worry about 5_ of carbon dioxide in the air . Predicts that any warming will be mild with few bad environmental 6_ . 7_that more carbon dioxide is actually a 8_ thing, which will make life for human beings better.high levels consequences States positiveChoose the best answers. 1. Which of the following is TRUE according to the text? A. The temperature of the earth increased about one degree Fahrenheit during the 20th century. B. The carbon dioxide content in the air increased by 70 parts per million from 1957 to 1997. C. All scientists accept the data in graph 2 except Charles Keeling. D. Janice Foster says that more carbon dioxide will make plants grow faster.A2. Which of the following is Dr Janice Fosters opinion? A. The result of the temperature increase will be serious. B. The amount of warming is nothing serious. C. We neednt worry about high levels of carbon dioxide. D. Global warming is a natural phenomenon.A Glance quickly at the magazine article and answer the questions.vWho wrote the magazine article? What is the name of the magazine?Sophie Armstrong wrote the magazine article. The name of the magazine is Earth Care.ComprehendingvWhat are the names of the three scientists mentioned in the article?They are Dr. Janice Foster, Charles Keeling and George Hambley.3. What do they think about global warming? Do they agree with one another?They dont agree with each other. Dr. Janice Foster thinks the effects of global warming could be very serious. George Hambley thinks global warming will be mild with few bad environmental consequences.Charles Keeling believes it is the burning of more and more fossil fuels that is resulting in a big increase in carbon dioxide.vWhat are the two graphs about?Graph I shows the temperature increase of one degree Fahrenheit between 1860 to 2000.Graph 2 is about the carbon dioxide content in the atmosphere, 1958-1990.vWhat is the main topic of the article?Global warming/ the warming of the earth.1. The temperature in the last century did not seem to increase much. 2. Everyone believes that global warming is caused by the activities of humans. 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 gl