Unit3Readingandthinking课件 高中英语人教版选择性必修第三册.pptx

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1、UNIT 3UNIT 3ENVIRONMENTAL PROTECTIONENVIRONMENTAL PROTECTIONReading and Thinking 先听视频然后听取信息先听视频然后听取信息Weve had_ days with the mercury hitting a _35 degrees Celsius._are set to rise even further this weekRight now,human beings are facing greatest_:climate change.Scientists were _ that climate change w

2、ould happen in the future.The_ of climate change can be seen.For example,greater storms,greater_,greater heat waves,_ sea level risesScientists firmly believe that we risk a _future and the _actions is needed.hot;scorching;Temperatures;threat;predicting;impact;floods;extreme;devastating;urgent1.What

3、 type of writing is this passage?A.Argumentative writing B.Narrative writingC.Expository writing D.Advertising writingC2.In which part of a newspaper or magazine may we find this passage?A.Entertainment B.EconomyC.Education D.EnvironmentDRead the passage quickly,and choose:1.What is the graph about?

4、What info.can u get from it?The graph shows the change in the Global Surface Temperature between 1920 and 2016.Look at the graph and discuss the questions in groups.2.What can you see in the photo?The polar bear starved to death because it could not find enough to eat.3.What are the relationship bet

5、ween them?It showed one of the effects brought by the rising temperature.What is the benefit of using a diagram?What is the benefit of using a diagram?Diagrams are very useful tools,which will not only allow you visualise the problems more clearly.Para 1:We have known about climate change for decade

6、s.There is little doubt that Earth is gettingwarmer and warmer(see the graph).A warming ocean and atmosphere along with melting iceand rising sea levels provide evidence of a dramatic change in the global climate.Para 2 In 2013,a lot of people were shocked by a news photo of a dead polar bear that w

7、as found on Norways Arctic island of Svalbard.According to the scientists who found its dead body,all thatremained of the polar bear was skin and bones.An expert who has studied polar bears formany years said that from the position of its dead body.the bear appeared to have starved anddied.Experts c

8、laimed that low sea-ice levels caused by climate change meant the bear couldnot hunt seals as before.so it had to travel greater distances in order to find food.This alarmingcase showed how the increase in temperature had an impact on Earths ecology.The evidence of dramatic climate change that had a

9、n impact on Earths ecologyUnderlined the key words in each para and then summarize the main ideaPara 3:Then Then what what is is causing causing the the increase increase in in the the global global average average surface surface temperature?Climate temperature?Climate scientistsoften scientistsoft

10、en mention mention a a key key climate climate process process called called the the greenhouse greenhouse effect.which effect.which has has two two commonmeanings:the commonmeanings:the naturalgreenhouse naturalgreenhouse effoct effoct and and the the man-man-madogreenhouse madogreenhouse effect.Th

11、e effect.The naturalgreenhouse naturalgreenhouse effect effect refers refers to to the the fact fact that that heat heat from from the the sun sun enters enters the the atmosphere atmosphere and and warmswarms Earths Earths surface surface as as short-wave short-wave radiation.The radiation.The heat

12、 heat is is released released back back into into space space at at longerwave longerwave lengths.Greenhouse lengths.Greenhouse gases gases in in the the atmosphere,such atmosphere,such as as methane methane and and carbon carbon dioxide.trap dioxide.trap some some of of the the heat,keeping heat,ke

13、eping Earths Earths climate climate warm warm and and habitable.Without habitable.Without this this process,Earth process,Earth could could not not sustain sustain life.However,the life.However,the man-madegreenhouse man-madegreenhouse effect effect has has now now becomea becomea big big problem.Wh

14、en problem.When people people produce produce huge huge amounts amounts of of extra extra greenhouse greenhouse gases gases by by burningfossil burningfossil fuels,more fuels,more heat heat energy energy is is trapped trapped in in the the atmosphere atmosphere and and causes causes Earths Earths su

15、rfacetemperature to rise quickly.surfacetemperature to rise quickly.The cause of the increase in the global average surface temperature The consequences of the rise in temperatureThere is strong and comprehensive evidence that the rise in temperature has led to an increase in extreme weather and nat

16、ural disasters worldwide,not only causing serious damage,but also costing human lives.Climate scientists have warned that it we do not take appropriate actions,this warming trend will probably continue and there will be a higher price to pay.In fact,rlews reports are frequently broadcast about extre

17、me rainstorms and heatwaves causing deaths and economic losses.The solutions to reducing greenhouse gas emissionsContinued greenhouse gas emissions will result in further warming and long-lasting changes tothe global climate.This requires the attention of people all over the world.Governments need t

18、o consider making policies and taking appropriate actions and measures to reduce greenhousegas emissions.We as individuals,can also reduce our carbon footpript by restricting theamount of carbon dioxide our lifestyles produce.It is our responsibility to seize every opportunityto educate everyone abo

19、ut global warming,along with its causes and impacts,because this isthe most serious issue affecting all of us on this planet.So what will you do to help?What is the authors purpose of writing this text?The authors purpose is to inform the readers and inspire them to do whatever they can to deal with this problem.Earth provides enough to satisfy every mans needs,but not every mans greed.Mohandas K.GandhiHow do you understand the quote?U strong desire for more wealth,power贪婪贪婪