Unit+6+Earth+First+Developing+ideas 高中英语外研版（2019）必修第二册

Unit6外研版（2019）英语必修二Developingideas(Reading)Earthfirst1.Tohaveageneralknowledgeofwhat'sreallygreeninourdailylife.2.Tolearntheroleandfunctionofsubheadings.3.Tolearnsomekeywordsandexpressionsinthislesson.Learningobjectives01020304Lead-inPre-readingWhile-readingPost-reading011

Whichshoppingbagismoreenvironmentallyfriendly?□Aplasticbag.□Apaperbag.□Neitherofthese.2

Whatshouldyoudotosaveenergywhenleavingyourhome?□Turnoffadevice.□Unplugadevice.□Neitherofthese.3

Whatfoodisbetterfortheenvironment?□Foodproducedneartowhereyoulive.□Foodproducedfarfromwhereyoulive.□Itdepends.4

Whichuseslesswater?□Takingabath.□Takingashower.□Itdepends.Nowworkingroupsandseeifotherpeopleshareyourideas.√√√√Lookatthequestionsabout“greenliving”andtickyouranswers.Lead-inReadthefoursubheadingsinthepassageanddecideiftheyaretrueorfalse.Thenreadthepassageandcheckyouranswers.□LearningtolearnAssubheadingsexpandonthemainheadingortitle,theycanbeslightlylongerthanthemainheading.Althoughnoteveryparagraphneedsasubheading,theycanbeskimmedtogivethereaderanoverallunderstandingofthecontentofatext.Pre-readingorevencompletely_____________.What’sthemainideaofthepassage?“green

truths”Itdiscussessomecommon______________whichhavebeenshownto

be____________SkimminghalftruefalseWhile-readingReadtheeffectsandcompletethecausesoftheseaccordingtothepassage.1

Makingapaperbagusesmoreenergyandwaterthanmakingaplasticbag.Italsoproducesmoregreenhousegases.Paperbagsarenotgoodfortheenvironment.234Turningoffadevicewon’tstopitfromusingpower.Eatinglocalfoodisn’talwaysbetterfortheenvironment.It’snotalwaysbettertotakeashowerthanabath.Devicesturnedoffgointostand-bymodeandstillusepower.Localproducesometimesmightusemoreenergyandproducemoregreenhousegasesthanproducegrownalongwayaway—eventakingintoaccountitstransport.Ifyouspendmorethaneightminutesinashower,you’lluseasmuchwaterasinabath—about50litresofwater.While-reading1Whichofthe“greentruths”surprisesyoumost?Giveyourreasons.2Areyouawareofanyother“greentruths”thatarenottrue?Sharethemwiththeclass.Whenyouturnoffadevice,itstopsusingpower.UsuallyIjustturnoffmytelevisionbeforegoingout,thinkingitisasafeandgreenway.Idon’tknowit’sstillawasteofenergy.Bike-sharingisagreenmethodoftransportationandprovidesauser-friendlyexperience.However,itcausestheenergytobewastedifthebikesarethrownawaybytheroadside.Think&SharePost-reading3How“green”areyou?Shareyour“greenactions”withtheclass.4Whatcanyoudotobecome“greener”?Iusuallytrytosaveenergyandwaterinmydailylife.Forexample,IalwaysturnoffthelightswhenIleavearoom.Iwalkorrideabikeinsteadoftakingabusorataxi.ItakeaclothbagwhenIgoshopping.Icanstopusingthethingsthatcanbeusedonlyonce.IcanunplugtheTVsetbeforeIgoout.Icanstoppeoplefromproducingpowerfromcoal.Think&SharePost-reading1

Usethesequestionstohelpplanyourtalk.·Which“greentruth”areyougoingtotalkabout?·Whydopeoplebelieveitis“green”?·Whyisitnotcompletelytrue?·Whatcanyoudotobecome“greener”?2

Organiseyourtalkfollowingthestepsbelow.·Startyourtalkbystatingthetopic.·Describeyourchosen“greentruth”inmoredetail.·Explainwhyitisnotcompletely“green”.·Endyourtalkbyencouragingyouraudiencetobecome“greener”.3

Giveyourtalktotheclass.Workingroups.Giveatalkaboutoneofthe“greentruths”inthepassage.Post-readingI’mgoingtotalkaboutoneofthe“greentruths”—Papershoppingbagsarebetterthanplasticones.Asweallknow,plasticbagscauselitterandareadangertowildanimals,whichmistakethemforfood.Ittakeshundredsofyearsforplastictobreakdown,butmuchlesstimeforpaper.Becauseofthis,wethinkpaperbagsarethebetterenvironmentalchoice.However,makingapaperbagusesfourtimesasmuchenergyasmakingaplasticbaganduptothreetimestheamountofwater.Theprocessalsoproducesmoregreenhousegases.Infact,bothkindsofbagsarebadfortheenvironment.So,w