unit4詞匯聽寫文章課件

1、unit4詞匯聽寫文章THE EARTH IS BECOMIG WARMER- BUT DOES IT MATTER?聽寫詞匯聽寫詞匯unit4詞匯聽寫文章 During the 20th century the temperature of the earth 1._ about one degree Fahrenheit. That 2._ does not seem much to you or me, but it is a 3._ increase when compared to other natural 4._. So how has this 5._ and does it

2、matter? Earth cares Sophie Armstrong 6._. These questions There is no doubt that the earth is becoming warmer (see Graph 1) and that it is human 7._ that has caused this 8._ warming rather than a 9._ but natural 10._.roseprobablyrapidchangescome aboutexploresactivityglobalrandomphenomenonunit4詞匯聽寫文章

3、 All scientists 1._ the view that the increase in the earths temperature is due to the burning of 2._ _ like coal, natural gas and oil to produce energy. Some3. _ of this process 4._ “greenhouse” gases, the most important one of 5._ is carbon dioxide. Dr Janice Foster explains: “There is a natural p

4、henomenon that 6._ call the “greenhouse effect”.This is when small amounts of gases in the 7._, like carbon dioxide, methane and water vapour, trap heat from the sun and 8._ warm the earth. fossil fuelssubscribe tobyproducts are called which scientists atmosphere thereforeunit4詞匯聽寫文章 Without thegree

5、nhouse effect the earth would be about thirty-three degrees Celscius 9._ than it is. So, we need those gases. The problem 10._ when we add huge 11._ extra carbon dioxide into the atmosphere. It means that more heat energy 12._ to 13._ in the atmosphere 14._ the global temperature to 15._. begins qua

6、ntities oftends be trapped causing go up coolerunit4詞匯聽寫文章 We know that the levels of carbon dioxide 1._ greatly over the last 100 to 150 years. It was a scientist 2._ Charles Keeling, 3._ made 4._ 5._ of the amount of carbon dioxide in the atmosphere from 1957 to 1997. He found that between these y

7、ears the carbon dioxide in the atmosphere went up from around 315 parts to around 370 parts 6._ million (see Graph 2)have increasedcalledwhoaccuratemeasurementsperunit4詞匯聽寫文章 All scientists accept this 7._. They also agree that it is the burning of more and more fossil fuels that has 8._ this increa

8、se in carbon dioxide. So how high will the temperature increase go? Dr Janice Foster says that over the next 100 years the 9._ of warming could be as low as 1 to 1.5 degrees Celsius, but it could be 10. _ high as 5 degrees.dataresulted inamountasunit4詞匯聽寫文章 However, the 1._ of scientists 2._ this ri

9、se in 3._ different. On the one hand, Dr Foster thinks that the 4._ which increases the temperature by 5 degrees would be a 5._. She says, “ We cant 6._ the climate well enough to know what 7._, but it could be very serious.” Others who 8._ _ her think there may be a rise of several metres in the se

10、a level, or predict severe storms, 9._, 10._, famines, the spread of diseases and the disappearance of species. attitudetowardscompletelytrendcatastrophepredictto expectagree withfloodsdroughtsunit4詞匯聽寫文章 On the other hand, there are those, like George Hambley, who 1._ this view, believe that we sho

11、uld not 2._ _ high levels of carbon dioxide in the air. They predict that any warming will be 3._ with few bad 4._ 5._. In fact, Hambley 6._, “More carbon dioxide is actually a 7._ thing. It will make plants grow quicker; crops will produce more; it will 8._ a greater 9._ of animals-all of 10._ will make life for human beings better.”are opposed to worry aboutmildenvironmentalconsequencesstatespositiveencouragerangewhichunit4詞匯聽寫文章 Greenhouse gases continue to 1._ in the atmosphere. 2._ we start 3._ the amount of carbon dioxide and other greenhouse gases, the 4._ is going to 5._ warming