1、Welcome to my class!,Unit 4 Global Warming,The Earth is Becoming Warmer -But Does It Matter? 地球在變暖 要不要緊？,Reading,New Words and expressions,temperature 溫度 one degree Fahrenheit 華氏一度 explore 探索 human activities 人類活動 phenomenon 現(xiàn)象 subscribe to 同意，贊成 fossil fuels 礦物燃料 byproduct 副產品 “greenhouse” gases 溫室

2、氣體 atmosphere 大氣 methane 甲烷， 沼氣,degree Celsius 攝氏度 quantities of 大量的 accurate measurements 精確的測量 data 資料，數(shù)據(jù) catastrophe 大災難 be opposed to 反對 environmental consequences 環(huán)境影響 a great range of 大量的 even if 即使 keep on 繼續(xù),Skimming,Skim the title: THE EARTH IS BECOMING WARMER BUT DOES IT MATTER?,What is th

3、e main topic? The earth. B. Global warming. C. Becoming warmer doesnt matter.,The structure of the article:,Introduction,A title,Body,Conclusion,Skim the body part(7 paras):,Para. 1,Para. 2-3,I,II,Para. 4-6,III,Para. 7,IV,Introduction,Body,Conclusion,Match the main idea of each part:,Explain how glo

4、bal warming comes about.,Two different attitudes among scientists towards the consequences of global warming.,Introduce the problem of global warming.,Give a warning and raise a question for the readers to think over.,I (1),II (2-3),III (4-6),IV (7),Who wrote the article?,What is the name of the mag

5、azine?,Careful reading : the first paragraph:,Sophie Armstrong,Earth Care,Part II(Para2-3),Everyone believes that global warming is caused by the activities of humans. Janice Foster believes that she can measure the future global rise in temperature. Greenhouse Gases are totally bad.,F,T,F,Fill in t

6、he blanks about the causes of Greenhouse effect.,henomenon,uantities,rapped,go up,Small,Para 4. the levels of carbon dioxide have increased greatly over the last 100 to 150 years,Who made accurate measurements of the amount of carbon dioxide? 2. How much has increased?,Charles Keeling,The carbon dio

7、xide in the atmosphere went up from around 315 parts to around 370 parts per million.,Para 5. How high will the temperature go?,The amount of warming could be as low as 1 to 1.5 degrees Celsius, but it could be as high as 5 degrees.,What do Dr. Janice Foster and the scientist George Hambley think ab

8、out the consequences of global warming? Do they agree with one another?,Para 6,They dont agree with each other.,Dr. Janice Foster thinks it is serious. George Hambley thinks global warming will be mild with few bad environmental consequences.,Does global warming matter?,Positive effects,Negative eff

9、ects,cause the sea level to rise severe storms floods droughts famines the spread of diseases disappearance of species,Positive effects,Negative effects,cause the sea level to rise severe storms floods droughts famines the spread of diseases disappearance of species,Positive effects,Negative effects,make plants grow quicker crops will produce more a greater range of animals make life better,Disscussion:How to reduce greenhouse gases?,Have a disscussion with your classmates .,The earth