1、Unit 4 Global warmingReadingThe Earth is WarmingBut does it matter？(2nd period)How didcome about?the snow catastrophe Global warming was one of the important reasons why such extreme climate like severe storms and heavy snow frequently came about.孙广勇造成极端天气频繁的一个重要原因就是全球变暖。global warmingTHE EARTH IS B
2、ECOMING WARMER BUT DOES IT MATTER？the causeGreenhouse effect is a natural p .Greenhouse gases in the atmosphere can warm the earth by trapping heat energy.But the problem begins when we add huge q of extra carbon dioxide to the atmosphere by burning fossil f.Therefore,more heat energy is tin the atm
3、osphere.It is the increased amount of carbon dioxide that is r in global warming.Fill in the blanks with the proper words according to the first letters given.henomenonuantitiesuelsrapped esultinghuge quantities ofHuge quantities of CO2 are added to the atmosphere.Huge quantities of fossil fuels are
4、 burned to produce energy.As a result of burning fossil fuels,a large of carbon dioxide _ added to the atmosphere.A.number;is B.quantity;is C.number;are D.quantity;areu Compared to ten years ago,the carbon dioxide content over this decade has gone up rapidly.u Carbon dioxide in the atmosphere is com
5、pared to the glass of greenhouse.1957197019903402000350360370Graph:CO2 content in the atmosphere,1957-1997yearparts per millionCompared withis similar tou 人们经常把老师比做园丁.People often _ teachers _ gardeners.u That probably doesnt sound very much to you or me but it is a rapid increase(与大多数的自然变化相比).compa
6、red to most natural changescompare to The rapid increase in global temperature would result in serious consequences.Serious consequences would result from the rapid increase in global temperature.result in:result from:cause sth.表示“引起某种结果”to be caused by sth.表示“由于某种原因而产生”as a result:as a consequencea
7、s a result of:as a consequence of 小猪变成了烤猪heat waves the rise in the sea level severe storms droughts famines the spread of diseases the destruction of species The earth is becoming warmer.,London would become a water city.The rise in the sea level would global warming.Global warming would the rise i
8、n the sea level.global warming,London would become a water city.As a resultresult fromresult inAs a result ofTalk about the picture by using the following phrases.result in result from as a result as a result of伦敦变成了水上城市It is certain that the earth is becoming warmer,but there are some very differen
9、t attitudes towards the effects of global warming.Some people think that if global temperature continues going up,it would be a disaster .Global warming would cause a rise in sea level;others predict weather changes like severe storms,droughts,famines,heat waves,and heavy snowstorms,famines,the spre
10、ad of diseases,and the destruction of species.On the other hand,there are those who believe more carbon dioxide is actually a positive thing.It will make plants grow faster;crops produce more and encourage a great variety of animals.There is no doubt thatcatastropheresult inclimatekeeps ona greater
11、range ofthe effects of global warmingthe effects of global warmingReplace the underlined expressions by using the words,phrases and patterns in the text.How did the snow catastrophe come about?u Many different articles about the causes of the snow catastrophe have been published.u Yesterday,I _(无意中发
12、现)an article about the causes of the snow catastrophe on the Internet.u I never expected the ideas about the causes of the snow catastrophe to _ so much.u Sun Guang Yong _ the idea in his article that global warming was the main reason for frequent extreme e to come out come across come up withhave
13、come outcame up withcame acrosscome to无疑今年冬天的暴风雪是场大灾难。网络上人们对雪灾的成因持有不同的看法。Oral practice(Group work)u 看法一:遭受美国气象(meteorological)武器袭击的结果.u 看法二:外星人(aliens)为了提高所有中国人的环境保护意识.u 看法三:全球变暖是雪灾的重要成因.Useful expressions:catastrophe consequenceclimate quantities of result in come about There is no doubt that There
14、 are some very different attitudes towards.Some people think that,othersOn the other hand,there are those who believe.When we talk about the greenhouse effect,we re talking about the world of tomorrow.We need to work together for a greener future;we have to carry the rainbow together.In a world of c
15、hange,we need to be changers.And remember,we didnt inherit this planet from our parents,we borrow it from our children and our childrens children.Start from every little bit to fight global warming.1.Go over the words and expressions.2.Write the composition about the causes of the snow catastrophe a
16、nd exchange your writing with your partners.Homework:无疑今年冬天的暴风雪是场大灾难。网络上人们对雪灾的成因持有不同的看法。请根据这些看法并结合你自己的观点写一篇文章.雪灾成因的观点1.遭受美国气象(meteorological)武器袭击的结果.2.外星人(aliens)为了提高所有中国人的环境保护意识.3.全球变暖是雪灾的重要成因.你的观点哪一种观点比较合理?为什么?Thank you for attention!Self Assessment Do they use the expressions learned today?Is the
17、ir speech attractive(有吸引力的)?5 3 1This winter,severe snowstorms in many southern provinces of China.This is the biggest snow for 30 years since the founding of New China.Streets and roads were covered with thick snow.Many cars the snow.In order to clear away the snow on the road,salt were used.Over t
18、his period,many flights and trains had been cancelled.As a ,many people returning home were delayed at the airports and railways stations for days.Up to Feb.12,the snowstorms have losses of 111,1 billion RMB._China has suffered great losses,there is_ that we can fight all the difficulties toa more powerful country.came aboutcatastrophewere trapped inhuge quantities ofresulted inconsequenceEven ifno doubtGreenhouse gases continue to build up.build up
