（新教材）2019_2020学年高中英语Unit6EarthfirstPartⅢDevelopingideas课件外研版必修第二册.ppt

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1、PartⅢDevelopingideasWhat’sreallygreen?Mostofusareaware(1)thatwemusttakecareoftheenvironment，andthemajorityofustakestepstosaveenergyandreducewasteandpollution.Butrecently，some“greentruths”havebeenshowntobeonlyhalftrue，orevencompletelyfalse.(2)Herearesomecommonones.Whicharereallygr

2、een?？Papershoppingbagsarebetterthanplasticones.Plasticbagscauselitterandareadangertowildanimals，whichmistakethemforfood.(3)Ittakeshundredsofyearsforplastictobreakdown，butmuchlesstimeforpaper.Becauseofthis，peoplethinkpaperbagsarethebetterenvironmentalchoice.However，(4)makingapaper

3、baguses(5)fourtimesasmuchenergyasmakingaplasticbaganduptothreetimestheamountofwater.Theprocessalsoproducesmoregreenhousegases.Infact，bothkindsofbagsarebadfortheenvironment.So，takeareusablebagwithyouwhenyougoshopping.？Whenyouturnoffadevice，itstopsusingpower.Whenweturnoffadevice，su

4、chastelevision，itgoesintostand-bymode.Devicesinthismodestillusepower，andolderdevicesinstand-bymodecanuseevenmore.Thishappens(6)becauseelectricitycontinuestoleakfromthedevice，evenwhenitisturned“off”.(7)Tomakesureyourapplianceisinfactoff，removetheplugfromitspowersupply.？Eatinglocal

5、foodisgoodfortheenvironment.Itseems(8)likecommonsense：eatinglocalfoodshouldbebetterfortheenvironment，becauseitdoesnotneedtobetransportedlongdistancesandkeptcoldduringtransport.Unfortunately，itisnotthatsimple.Itistheproductionoffood，notitstransport，(9)thatusesmostoftheenergyandpro

6、ducesmostofthegreenhousegases.Insomecases，localproducemighthaveusedmoreenergyandproducedmoregreenhousegasesthanproduce(10)grownalongwayaway—eventakingintoaccountitstransport.？It’sbettertotakeashowerthanabath.Itdependson(11)howlongyouspendintheshowerandhowlargeyourbathis.Ifyouspen

7、dmorethaneightminutesinashower，you’lluseasmuchwaterasinabath—about50litresofwater.Therefore，thekeyis(12)tokeepyourshowertimeasshortaspossible.Environmentalawarenessisnowpartofdailylife.Butit’sworthcheckingcommonideasandopinionstosee(13)what’sreallygreen.(1)作表语的形容词后面带有宾语从句。(2)此处为主

8、系表结构的倒装句。(3)it作形式主语，代替后面的不定式短语。(4)动名词短语m