1、Unit 4 Global WarmingUnit 4 Global WarmingThe Earth is Becoming Warmer-But Does It Matter?地球在變暖地球在變暖要不要緊？要不要緊？ReadingNew Words and expressionstemperature 溫度 one degree Fahrenheit 華氏一度explore 探索human activities 人類活動(dòng)phenomenon 現(xiàn)象 subscribe to 同意，贊成 fossil fuels 礦物燃料byproduct 副產(chǎn)品 “greenhouse” gases 溫室氣

2、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(cè)量data 資料，數(shù)據(jù)catastrophe 大災(zāi)難be opposed to 反對(duì)environmental consequences 環(huán)境影響a great range of 大量的 even if 即使 keep on 繼續(xù)Skim the title: THE EARTH IS BECOMING WARMER BUT DOES IT MATTER? The earth. B. Global warming. C

3、. Becoming warmer doesnt matter. The structure of the article: IntroductionA titleBodyConclusionSkim : Para. 1Para. 2-3Para. 4-6Para. 7Match the main idea of each part: Who wrote the article?What is the name of the magazine?Careful reading :the first paragraph: Everyone believes that global warming

4、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.FTF1. Greenhouse effect is a natural p_. _ amounts of Greenhouse gases in the atmosphere. But the problem begins when we add huge q of extra carbon

5、 dioxide to the atmosphere. Therefore, more heat energy is t in the atmosphere causing the global temperature to _. Fill in the blanks about the causes of Greenhouse effect.henomenon uantities rapped go upSmallPara 4. the levels of carbon dioxide have increased greatly over the last 100 to 150 years

6、 Who made accurate measurements of the amount of carbon dioxide?2. How much has increased?Charles KeelingThe carbon dioxide 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 degre

7、es Celsius, but it could be as high as 5 degrees.What do Dr. Janice Foster and the scientist George Hambley think about the consequences of global warming? Do they agree with one another?Para 6Dr. Janice Foster thinks it is serious.George Hambley thinks global warming will be mild with few bad envir

8、onmental consequences. Does global warming matter?Positive effects Negative effects cause the sea level to rise severe storms floods droughts famines the spread of diseases disappearance of speciesPositive effects Negative effects cause the sea level to rise severe storms floods droughts famines the spread of diseases disappearance of speciesPositive effects Negative effects make plants grow quicker crops will produce more a greater range of animals make life betterDisscussion:How to reduce greenhouse gases?Have a disscussion with your classmates .The eart