资源描述:
《高中英语 Unit 7 The sea Lesson 26 Protecting the Sea课件 北师大版必修3.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、Unit7TheSea26ProtectingtheSeaHowistheseaimportanttopeople?Peoplecangetseafoodsuchas:fish,seaanimalsandplants;Theseaisrichinmanynaturalresources.wecangetoil,naturalgasandsomemetals,besides,theseahasagreateffectonclimateontheearth.Japaneseshiparekillingthewhale.Howcruelt
2、heyare!!!Theseaisimportanttous.Butwiththedevelopmentofsociety,humanbeingsexploreandseizetheseawithoutlimit,asaresult,doharmtothesea.over-fishingHarvestfishnow,Whataboutthefuture?Whathappened?Theoiltankerwasupset,oilpouredintothesea.Whatistheresult?Whocansavethepoorbird
3、s?In1989anoiltankerhitarockoffthenorthwestcoastofAlaska.35,000tonsofoilpouredintothesea.Theaccidentwasoneoftheworstinhistory.Morethan34,000birdsand10.000animalswerekilled.4,8oosquarekilometersofoceanwerepolluted.TheSeaisweepingWhatwillhappen?industrialwasteredtideIsthe
4、renothingwithus?ChinahasbeenexperiencingincreasingredtidesofftheChinesecoastsincethe1990sduetoincreasingpollutioncausedbyindustrialwaste.Accordingtoanofficialreport,duringthepast20years,atotalof200redtideshavebeenregistered(经正式鉴定的)causing240millionU.S.dollarsindirectec
5、onomiclosses.The45majorredtidesoccurredintheBohaiSea,theYellowSea,theEastChinaSeaandtheSouthChinaSea.About4billiontonsofindustrialwastewateraredischarged(排放)intotheseaeveryyear,resultingintheaccumulation(积累)oforganicpollutantsblamed(归咎于有机污染物)forthegrowingoutbreaksofdis
6、astrousredtides.Redtidesmayalsodestroymarinelives(海洋生物)andbringharmtomarinecultivationindustries(海洋养殖业).1.Youarelikelytonoticesomethingaboutseapollutioninyourcityorhometown,pleasetalkaboutit.2.Ifwegoonpollutingtheseawhatistheresult?Ifthegovernmentgoonallowingtheindustr
7、ialwastefromfactoriesintotheseaandrivers,itisnotsafetoeatthefish.Ifwegoonpouringtherubbishintothesea,itisnolongersafeforswimming,asalotofdiseasesarepresentinthewater.Ifwegoonpollutingthesealikethat,childreninthefuturewillnotseebeautifulbluesea.3.Whatmeasuresdoyouthinkw
8、eshouldtake?Thegovernmentshouldmakelawstoprotectthesea.Wetakeactionlikethemtoprotectthesea.cleaningoilThepeopleoftheG