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1、Unit10TheworldaroundusLISTENING1Listentothetapeandfillinthecorrectinformationinthespacesbelow.1.Walkalongthestreetofanymajorcity,andyouwillseethattheairyoubreatheisnotveryfresh.Airpollutionisaseriousprobleminmanyoftheworldbigcities.Itiscausedbycarsandfactories.Wealsopollutetheairwhen
2、weburnoilorcoalforenergyandheat.2.Oh,my,lookatthis,deadfisheverywhereWhathappened?Weusedtobeabletodrinkthewaterinriversandlakes.Buttoday,manyriversandlakeshavebeensopollutedthatthewaterisuseless.Factories'anddrainagehavebeenpollutingthewater.Wearen'ttakinggoodcareofwater.Weusetoomuch
3、waterandwewastewater.Whatismorewepollutewater.3.Thisbeautifulmountainisoneofthemostpopularplacesforpeopletovisite,duringholidaysandfestivals.Thousandsofpeoplecomeheretohikeinthemountainsforestesandvalleies.Unfortunatelythetouristsleavealotofrubbishbehind,plasticbags,sodabottlesandoth
4、erthingsarethrowneverywhere.Manytouristsalsopickflowersanddemadgethetrees.Andthemanyhotelsinrestaurantsbeeningbuiltarehavinganegativeaffectontheenvironment,too.READINGAREWEENDANGEREDSteveJonesisanenvironmentalexpertwhotriestokeepanimalsandplantsfrombecomingendangered."Wearenotalonein
5、theworld.Wehumanbeingscouldnotsurvivewithoutalltheplantsandanimalsaroundus.Weoftentalkabouthowimportantitistotakegoodcareofourselvesandourplanet,butwedon'talwaysdoaswesay,"StevesaysashetakesusonatourofGreenParkinBirmingham.Manyoftheearth'splantsandanimalshavealreadydiedout,andseveral
6、otherspeciesareendangered.Ifwewanttoliveabetterlifeandhaveabrightfuture,wemustlearntoactinwaysthatdonotharmotherlivingthings.Ifweknowmoreaboutwhatcausesendangerment,wemaybeabletotakemeasuresbeforeitistoolate.Aspeciescanbecomeendangeredfordifferentreasons.Animalsandplantsmusthaveahabi
7、tat,orhome,whichiscomfortableandclean,andwherethereisenoughfoodandotherresources.Theyareallusedtotheirenvironment;thatis,theyhavelearnthowtolivesuccessfullyintheirhabitat.Whenthehabitatofaspeciesischangedordestroyed,theanimalorplanthastoeitheradapttothechangeorfindanewhome.Ifthisisno
8、tpossible,th
