Lesson2ProtectingtheSea (3).ppt

北师大高一必修3Unit7,Lesson2,Unit7TheSea,ProtectingtheSea,Letsenjoythewonderfulseaanditsrichrecourses.,thepureandbeautifulsea,However,doyouknowhowabouttheseaisnow?,Dirty,Polluted,Theseaisbeingillnow.Itisbadlypolluted.,Oilandpetrolpollutedthesea.,Seapollutioncausedfishandseaanimalstodie.,Howistheseaimportanttopeople?Peoplecangetseafoodsuchasfish,seaanimalsandplants.Theseaisrichinmanynaturalresources.Wecangetoil,naturalgasandsomemetals,besides,theseahasagreateffectonclimateontheearth.,Japaneseshipsarekillingthewhale.,Howcrueltheyare!,Theseaisimportanttous.Butwiththedevelopmentofsociety,humanbeingsexploreandseizetheseawithoutlimit,asaresult,doharmtothesea.,Harvestfishnow,whataboutthefuture?,over-fishing,Whathappened?,Theoiltankerwasupset,oilpouredintothesea.,Whatistheresult?,Whocansavethepoorbirds?,In1989anoiltankerhitarockoffthenorthwestcoastofAlaska.35,000tonsofoilpouredintothesea.Theaccidentwasoneoftheworstinhistory.Morethan34,000birdsand10,000animalswerekilled.4,800squarekilometersofoceanwerepolluted.,industrialwaste,TheSeaisweeping.,Whatwillhappen?,Istherenothingwithus?,redtide,ChinahasbeenexperiencingincreasingredtidesofftheChinesecoastsincethe1990sduetoincreasingpollutioncausedbyindustrialwaste.Accordingtoanofficialreport,duringthepast20years,atotalof200redtideshavebeenregistered(经正式鉴定的)causing240millionU.S.dollars,indirecteconomiclosses.The45majorredtidesoccurredintheBohaiSea,theYellowSea,theEastChinaSeaandtheSouthChinaSea.About4billiontonsofindustrialwastewateraredischarged（排放）intotheseaeveryyear,resultingintheaccumulation（积累）oforganic,pollutantsblamed(归咎于有机污染物)forthegrowingoutbreaksofdisastrousredtides.Redtidesmayalsodestroymarinelives(海洋生物)andbringharmtomarinecultivationindustries(海洋养殖业).,1.Youarelikelytonoticesomethingaboutseapollutioninyourcityorhometown.Pleasetalkaboutit.,2.Ifwegoonpollutingtheseawhatistheresult?Ifthegovernmentgoonallowingtheindustrialwastefromfactoriestopourintotheseaandrivers,itisnotsafetoeatthefish.,Ifwegoonpouringtherubbishintothesea,itisnolongersafeforswimming,asalotofdiseasesarepresentinthewater.Ifwegoonpollutingthesealikethat,childreninthefuturewillnotseethebeautifulbluesea.,3.Whatmeasuresdoyouthinkweshouldtake?Thegovernmentshouldmakelawstoprotectthesea.Wetakeactionlikethemtoprotectthesea.,cleaningoil,ThepeopleoftheGreenPeaceOrganization(绿色和平组织)arestrugglingwiththeshipforcatchingwhales.,Whataretheydoing?,Weshouldspreadtheknowledgeaboutprotectingtheseaandletpeoplerealizetheimportanceofthesea.ZhiHongandFangZhouarealsotalkingaboutprotectingthesea.Whatwilltheysay?,Listentothetapeandchoosetherightanswer.,1.Whatcanbedoneaboutoverfishing?A.man-maderaisingfishB.intheworstareastheybanfishingforseveralyearsC.controlthenumberoffishpeoplecancatch,C,2.Whatstheresultofoverfishing?A.Therearelessfishtocatch.B.Peoplecanfishtoomuch.C.Theycancatchmorefishthanbeforebybettertechnology.,A,3.Whataresomegovernmentdepartmentsdoingaboutseapollution?A.Punishingpeoplewhokeeparecordoflevelsofpopulation.B.Thinkingofwaystoreducepopulation.C.Alldepartmentsmustberesponsibleforfindingwherepollutioncomesfrom.,B,Listentothetapeagainandfillintheblanks.,1.Thatswhenpeoplefish_andthenumberoffish_.Somefishmaydisappearaltogether.,toomuch,fallstoolow,2.Sotherearemorefishermen_?Well,theyhopeto_,butthereare_tocatch,sothey_.,catchingmorefish,catchmorefish,lessfish,simplycant,3.Allsorts:chemicals,plastic,rubbish,oil;mostofthemcomefrom_and_.,industrial,agricultural,4.Theyalsotrytohelppeopleto_sothereare_tryingto_.,lesspeople,makingalivingfromfishing,getotherkindsofjobs,Listentotheinterviewagainandanswerthequestions.1.WhatistheProblem1?Pollution.2.WhatistheProblem2?Over-fishing.,3.WhatarethecausesforProblem2?Toomanyfishermeninthesameplace,bettertechnologycancatchmorefish.4.WhatarethecausesofProblem1?Chemicals,plastic,rubbish,oil,industrialwaste,andagriculturalwaste.,5.WhatarethesolutionstoProblem1?Governmentdepartmentslookforwaystoreducepollution,keeparecordoflevelsofpollution,findingwhereitcomesfrom,punishingpeoplewhocausepollutionandbreakthelaw.,6.WhatarethesolutionstoProblem2?Controlthenumberoffishthatpeoplecancatch,banfishingcompletely,helppeopletogetotherkindsofjobs.,Somefishmaydisappear(1)_?altogether.nowtherearetoomany(2)_fishermenfishinginthethattherearemoresameplace.fishermennowthantherewerebefore?Mostofthemcomefrom(3)_abigindustrialandproblemagriculturalwaste.Somegovernment,Really,Doyoumean,Itsoundslike,Interaction,Speaker,Listener,departmentsaretryingtodealwiththesituation.(4)_oftenitsquitedifficulttofindwhosresponsible(5)_forpollution._Theyalsotrytohelppeopletogetotherkinds(6)_ofjobssotherearelesspeopletryingtomakealivingfromfishing,Arethey?,Yes,Isupposeitmustbe.,Thatsagoodidea.,A:Whatareyougoingtodoforyourseaproject?B:Iminterestedinhistoryofseatravel.,Nowworkinpairs.Taketurnstotelleachotheraboutyourprojects.Whenyoulisten,trytoshowinterest.,A:Oh,really?B:Yes.Iwanttoknowhowhumanbeingscrossedtheseatolandotherplacesinasmallboat.A:Oh!Itishardtoimagine.B:Mm.Theywerebraveandcleverenoughtoexploreunknownland.,A:Whatdoyoualreadyknowaboutthesubject?B:IknowitwasntColumbusbuttheVikingreachedAmericafirst.A:Oh,werethey?B:Yes,lookattheoldmap.ItisthoughtthattheVikingdrew,themapthatwasusedbyColumbuslater.A:Mm.Iti