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1、U2Listening1TourGuide:OK,everyone,here’sournextexhibit.Doyouseethebodyofthelittlebirdinthatbottle?Thatisaduskyseasidesparrow.ItwasanoldmalethatdiedonJune16,1987.It’skindofsadbecausehewastheverylastduskyseasidesparrowintheworld.They’renowextinct.Yes,youhaveaquestion?Male:Doyouknowwhy
2、theybecameextinct?TourGuide:Basically,theylosttheirhabitat.See,theduskyseasidesparrowlivedonlyinoneplace—onMerrittIslandinFlorida.Theislandhadalotofmosquitoesandwetlands.ThepeopleonMerrittIslandusedchemicalstokillthemosquitoes.TourGuide:Thosechemicalswerealsoveryharmfultothesparrows
3、,andmanydied.Inaddition,thepeopleonMerrittIslandtriedtocontrolandexploitthewetlands.Astheyalteredthem,thewetlandswerenolongeragoodhabitatforthesparrows.Thebirdsdiedonebyoneuntilthereweren’tanyleft.Female:So,ifpeopleweretoblame,can’twemakesuresomethinglikethatneverhappensagain?TourGu
4、ide:We’retrying.Thesituationwiththeduskyseasidesparrowmakesonethingveryclear.Weneedtoprotectendangeredanimals.However,it’sabetterstrategytoprotecttheanimalsandtheirhabitats,too.Afterall,ifananimal’shabitatisdestroyed,theanimalwilllikelybecomeextinct.TourGuide:We’retrying.Thesituatio
5、nwiththeduskyseasidesparrowmakesonethingveryclear.Weneedtoprotectendangeredanimals.However,it’sabetterstrategytoprotecttheanimalsandtheirhabitats,too.Afterall,ifananimal’shabitatisdestroyed,theanimalwilllikelybecomeextinct.That’swhytheEndangeredSpeciesAct,whichwaspassedintheUnitedSt
6、atesin1973,protectsbothendangeredanimalsandtheirhabitats.Forexample,thesteelheadtroutlivesinriversandstreamsonthewestcoastoftheUnitedStates—theColumbiaRiverinWashingtonstateforinstance.Recently,boththefishandtherivercameundertheprotectionoftheEndangeredSpeciesAct.Male:Buthowcanwepro
7、tectlargeareassuchasriversandforests?Noone—noteventhegovernment—canaffordtobuyorcontrolallthelandthatendangeredspeciesliveon.TourGuide:Goodpoint.Infact,that’swhatmakestheEndangeredSpeciesActdifficulttofullyenforce.There’sanongoingconflictbetweensomelandownersandthegovernment.Takethe
8、caseofthegraywolf,f
