Unit 3 Reading and thinking （ppt课件）-新人教版（2019）《高中英语》选择性必修第三册.pptx

1、Climate change requires the worlds attentionPPT模板下载： 植树节3月22日 世界水日3月21日 世界森林日3月9日 保护母亲河日3月23日 世界气象日3月1日 国际海豹日3月14日 世界反水坝日3月3日 世界野生动植物日Do you know any festivals about environment in March?Protect environmentPPT模板下载： videoQ1:How much carbon dioxide has increased in the atmosphere since the industrial

2、revolution?Q2:What are the consequences of climate change?Over a third.Oceans:melting glacier,rising sea levels and some coastlands that were inundated.Weather:storms,floods,heavy snowfall,drought and other extreme weatherFood:growing crops becomes more difficult.Health:higher smog can cause disease

3、s.PPT模板下载： Para.1Para.4Para.3 Para.5Para.2Earth is getting warmer and warmer.Everyone should do something for reducing greenhouse gas emissions.The impact of global warming on mankind.Greenhouse effect includes the“natural”greenhouse effect and the“man-made”greenhouse effect.A polar bear have starve

4、d and died.PPT模板下载： We have _ about climate change for decades.There is little doubt _ Earth is getting _ and _(see the graph).A warming ocean and atmosphere along with _ ice and _ sea levels provide evidence of a dramatic change in the global climate.knownwarmer warmer melting risingthat=There is n

5、o doubt that 毫无疑问PPT模板下载： did polar bears starve to death?They couldnt find other food Seals couldnt been huntlow sea-ice levelsskin and bonesstarve and deathWhy?PPT模板下载： 2013,a lot of people were shocked by a news photo of a dead polar bear that was found on Norways Arctic island of Svalbard.Accord

6、ing to the scientists who found its dead body,all that remained of the polar bear was“skin and bones.An expert who has studied polar bears for many years said that from the position of its dead body,the bear appeared to have starved and died.Experts claimed that low sea-ice levels caused by climate

7、change meant the bear could not hunt seals as before,so it had to travel greater distances in order to find food.This alarming case showed how the increase in temperature had an impact on Earths ecology.PPT模板下载： includes _2._ Earths surface3._earth1._the solar short-wave radiationthe surface long-wa

8、ve radiationmethane,carbon dioxide,etc.warmsThe greenhouse effectburning fossil fuelsPPT模板下载： Earths surface temperature to rise quicklyGreenhouse effectkeeping Earths climate warm and habitableThe _ greenhouse effectThe _ greenhouse effectnaturalman-made_PPT模板下载： what is causing the increase in the

9、 global average surface temperature?Climate scientists often mention a key climate process called the“greenhouse effect”,which has two common meanings:the“natural”greenhouse effect and the“man-made”greenhouse effect.Greenhouseeffect refers to the fact that heat from the sun enters the atmosphere and

10、 warms Earths surface as short-wave radiation.The heat is released back into space at longer wave lengths.Green house gases in the atmosphere,such as methane and carbon dioxide,trap some of the heat,keeping Earths climate warm and habitable.Without this process,Earth could not sustain life.However,t

11、he“man-made”greenhouse effect has now become a big problem.When people produce huge amounts of extra greenhouse gases by burning fossil fuels,more heat energy is trapped in the atmosphere and causes Earths surface temperature to rise quickly.表虚拟语气与现在、将来事实相反:would/should/could/might+do与过去事实相反：would/s

12、hould/could/might+have donePPT模板下载： exercises海洋环境污染1.What is the rise in temperature causing?2.What are their hazard(危害)?Please give an example.An increase in extreme weather and natural disasters worldwide.The environmental disruption,costing human lives,economic losses.PPT模板下载： is strong and compr

13、ehensive evidence that the rise in temperature has led to an increase in extreme weather and natural disasters worldwide,not only causing serious damage,but also costing human lives.Climate scientists have warned that if we do not take appropriate actions,this warming trend will probably continue an

14、d there will be a higher price to pay.In fact,news reports are frequently broadcast about extreme rainstorms and heat waves causing deaths and economic losses.不仅而且 表并列，使用就近原则PPT模板下载： should we do to reduce greenhouse gas emissions?Governments Individuals to reduce greenhouse gas emissions make polic

15、ies take appropriate actions and measures reduce“carbon footprint”educate everyone about global warmingimprove the structure of energy,afforestation（植树造林）a carbon tax,carbon tradingprivate car less,save water,energy and grains reduce standby energy（待机能耗）consumption of electric appliancePPT模板下载： gree

16、nhouse gas emissions will result in further warming and long-lasting changes to the global climate.This requires the attention of people all over the world.Governments need to consider making policies and taking appropriate actions and measures to reduce greenhouse gas emissions.We as individuals ca

17、n also reduce our“carbon footprint by restricting the amount of carbon dioxide our lifestyles produce.It is our responsibility to seize every opportunity to educate everyone about global warming,along with its causes and impacts,because this is the most serious issue affecting all of us on this plan

18、et.So what will you do to help?PPT模板下载： produced by human activitiesHazards:_ _Impact:_ _Mind maprising sea levelsextreme weather and natural disastersclimate changereduce“carbon footprint”polar bears starved and deathcosting human lives,economic lossesexcess greenhouse gasesmake policies PPT模板下载： y

19、ou know Chinas achievements in environmental protection in recent years?2.How should we balance our needs and sustainable nature?Desert control:1097.8 thousand hectares(公顷)Afforestation:increase to 175.6 million cubic metersWhite pollution:-0.2 million tonsCarbon emission:-35%The strategy of sustain

20、able development.Lucid waters and lush mountains are invaluable assets.PPT模板下载： the recent years,China has made great achievements in environmental protection,but there is a long way to go.So you should design a poster with your partners to call on all people to take part in environmental protection action according to this passage.Demands:clear theme;novel design