(公开课课件)北师版英语选修八Unit-22-Lesson-1-Natural-Disasters.ppt

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1、Lesson 1 Global WarmingThe Greenhouse Effect BritainUSAWhich countries do you think contribute more to global warming?Why?South AfricaDeveloped countries or developing countries?peopleTraffic Jam FactoryRead the text quickly when you come across these words underline themconsensus:bounce:agriculture

2、:coincidence:general agreementto spring back from a surfaceThe science of growing food and raising animals-farming two or more events happening at the same time,apparently by accidentcondemn:reservation:sacrifice:advocate:sentence to punishmenta doubt that prevents one accepting something whole hear

3、tedlythe giving up of something for the sake of something considered more valuableto support or urge by argumentGlobal WarmingIntroductionListen to the tape and use one word to conclude each paragraph.DefinitionCausesEffectsSolutionsThe problem Global WarmingdefinitionThe _1_ in Earths temperature _

4、2_ the climate._3_1.Our planet is being _4_.2.It will cause _5_ changes.3.Many people will suffer from _6_.4.Many islands and cities will be _7_ by the sea.Reduce the amount of green house _8_.1.Try to _9_ used things.2.Try to _10_ energy and resources.increasechangescausescondemned/destroyeddisease

5、sfloodedgasesrecyclesaveFill the form according to the textclimateeffectssolutionsHuman activities,increased industry agriculture,and so on.,3.Read the text quickly and use one word to define each paragraph.1.What is global warming?Global warming is an average increase in the Earths temperature that

6、 leads to climate change.2 Are greenhouse gases necessary for life on Earth?Yes,they are,because they trap heat from the sun in the Earths atmosphere.Otherwise the Earth would be cold and unsuitable for life.3.By how much has the global average temperature increased in the last 100 years5.How can we

7、 help solve the problem of global warming?4What human activities are causing global warming?Industry,agriculture,the cutting down of forests,the increase in transport and the burning of fuels are causing global warming.We can make small changes like taking public transport,recycling,using low-flow s

8、hower heads,and buying energy-efficient light bulbs to help stop global warming.By 1 F(degree Fahrenheit)Voice your opinionWhat can you do every day to help reduce greenhouse gases?Taking public transport like buses can reduce greenhouse gas emissions And taking trains help a reduction of greenhouse

9、 gas.The recycling symbolBuy the recycled productsRecycled products Recycling the bottles Your glass bottles could be recycled into house insulation,plastic bottles could be made into a comfortable wollen jacket.Paper recycling your paper could become part of a road or race-trackusing low-flow showe

10、r headsbuying energy-efficient light bulbsreplacewith If we add up all these small changes made by everyone worldwide,they wont be such small changes,they would be the changes that save our future.Who say you can not change the world?1.Read the text after class.2.Try to recycle 5 plastic bottles today.

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