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国际交流英语视听说国际交流英语视听说Unit2ProtectingOurPlanetBook4国际交流英语视听说国际交流英语视听说ThinkandDiscussViewingtheWorldExploringtheThemeAnalyticalListeningSharingYourIdeasEngagingFurtherListeningContent国际交流英语视听说ThinkandDiscussUnit2ProtectingOurPlanetThinkandDiscussQuestionsAnendangeredturtlefloatsoveradeadcoralreef.1.Lookatthephotoandreadthecaption.Whatdoyouimaginethisscenelookedlike50or60yearsago?Whatcausedthechange?2.Whataresomereasonsthatanimalsbecomeextinct?3.Whodoyouthinkshouldberesponsibleforprotectingendangeredspecies?Governments?Companies?Citizens?ThinkandDiscussExampleAnswersFiftyor60yearsago,thescenewasprobablymuchmorecolorful,withdifferentspeciesoflivecoralanddifferentkindsoffish.Thedamagewasprobablycausedbyhumanactivitiessuchascommercialfishingorscubadiving.Risingoceantemperaturesfromglobalwarmingcanalsocausethedeathofcoralreefs.Questions1.Lookatthephotoandreadthecaption.Whatdoyouimaginethisscenelookedlike50or60yearsago?Whatcausedthechange?ThinkandDiscussExampleAnswersSpeciescanbecomeextinctduetoover-huntingorover-fishing,climatechange,lossofhabitat,orcompetitionfrominvasivespecies.Questions2.Whataresomereasonsthatanimalsbecomeextinct?ThinkandDiscussExampleAnswer1Ithinkgovernmentsshouldberesponsibleforprotectingendangeredspeciesbecausetheyhavethepowertopassandendorselawsthatprotectthespecies.Questions3.Whodoyouthinkshouldberesponsibleforprotectingendangeredspecies?Governments?Companies?Citizens?ThinkandDiscussExampleAnswer2Ithinkcompaniesshouldberesponsibleforprotectingendangeredspeciesbecausetheysometimescauseenvironmentaldamage,andtheyhavefinancialresources.Savinganendangeredspeciesmightalsobegoodforacompany’spublicimage.Questions3.Whodoyouthinkshouldberesponsibleforprotectingendangeredspecies?Governments?Companies?Citizens?ThinkandDiscussExampleAnswers3Ithinkcitizensshouldberesponsibleforprotectingendangeredspeciesbecausegovernmentsandcompanieshavenotdoneenough.Citizensshouldjointogethertoprotectthesespeciesthrougheducationandpublicpressureoncompaniesandgovernments.Questions3.Whodoyouthinkshouldberesponsibleforprotectingendangeredspecies?Governments?Companies?Citizens?国际交流英语视听说ExploringtheThemeUnit2ProtectingOurPlanetExploringtheThemeProtectingOurPlanetInternationalUnionforConservationofNature(IUCN):theworld’soldestandlargestglobalenvironmentalorganizationfoundedin1948.Withmorethan1,200memberorganizations,todayitisaleadingauthorityontheenvironmentprotectionandsustainabledevelopment.Almost11,000scientistsandexpertsfromtheworlddovolunteerworkforit.世界自然保护联盟ExploringtheThemeA|Lookatthephotosandreadthecaptions.Thendiscussthequestions.1.Lionsandothertypesofbigcatsaredyingatarapidrate.Whatdoyouthinkisthebiggestthreattotheseanimals?2.Ifaplantspeciesbecomesextinct,whateffectdoesthishaveontheenvironment?ProtectingOurPlanetExploringtheThemeAnAfricanlionrestsnearatreeinBotswana.Overthepast20years,manyAfricanlionshavedied.ProtectingOurPlanetExploringtheThemeAroundtheplanet,humanimpacthasresultedinthedestructionofanimalandplantlife.Nowconservationistsaretryingtosavetheseplantsandanimalsfromextinction.Onceaplantoranimalisextinct,therewillbenolivingmembersofthatspeciesleftontheplanet.ProtectingOurPlanetExploringtheThemeAroundtheplanet,humanimpacthasresultedinthedestructionofanimalandplantlife.Nowconservationistsaretryingtosavetheseplantsandanimalsfromextinction.Onceaplantoranimalisextinct,therewillbenolivingmembersofthatspeciesleftontheplanet.ProtectingOurPlanetExploringtheThemeExampleAnswersThebiggestthreattobigcatsisprobablyhunting.Peoplewanttheirskins,orinsomecases,theymightthinkthebigcatsareathreattopeopleortodomesticanimals.Habitatlosscouldbeanotherfactorthatisendangeringbigcats.1.Lionsandothertypesofbigcatsaredyingatarapidrate.Whatdoyouthinkisthebiggestthreattotheseanimals?ProtectingOurPlanetExploringtheThemeExampleAnswersIfaplantspeciesbecomesextinct,thenanyinsectspeciesoranimalthatdependsonitcouldgowithoutfoodandshelter.Inaddition,plantsareimportanttothesoilandtheair,solosingaplantspeciescouldhaveseveralnegativeeffectsontheenvironment.2.Ifaplantspeciesbecomesextinct,whateffectdoesthishaveontheenvironment?ProtectingOurPlanetExploringtheThemeB|Lookatthechart.Thendiscussthequestions.Eachyear,theInternationalUnionforConservationofNaturestudiesplantsandanimals.Manyofthespeciesstudiedarethreatenedoratriskofdying.Thegraphshowsthepercentageofthreatenedspeciesineachcategory.Thenumbersatthetopofthebarsshowhowmanyspecieswerestudied.ProtectingOurPlanetExploringtheTheme1.Whichgroupisthemostthreatened?Whichistheleast?2.WhichcategoriesofspeciesarecommoninChina?ProtectingOurPlanetExploringtheThemeExampleAnswersTropicalpalmshavethegreatestpercentageofspeciesindanger,whilelobsters,ontheotherhand,havethesmallestpercentageandnumberofspeciesindanger.Therefore,tropicalpalmsarethemostthreatenedandlobstersaretheleastthreatened.1.Whichgroupisthemostthreatened?Whichistheleast?ProtectingOurPlanetExploringtheThemeExampleAnswersAllofthecategoriesofspeciesarecommoninChinaexceptfortropicalpalms,whichcanbeonlyseeninseveralprovinces.Coralreefsusedtobecommo