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1、Lesson47Toohighaprice?代价太高一、【Text】课文Pollutionisthepricewepayforanoverpopulated,overindustrializedplanet.Whenyoucometothinkaboutit,thereareonlyfourwaysyoucandealwithrubbish:dumpit,burnit,turnitintosomethingyoucanuseagain,attempttoproducelessofit.Wekeeptr
2、yingallfourmethods,buthesheervolumeofrubbishweproduceworldwidethreatenstooverwhelmus.Rubbish,however,isonlypartoftheproblemofpollutingourplanet.Theneedtoproduceever-increasingquantitiesofcheapfoodleadstoadifferentkindofpollution.Industrializedfarmingmet
3、hodsproducecheapmeatproducts:beef,porkandchicken.Theuseofpesticidesandfertilizersproducescheapgrainandvegetables.Thepricewepayforcheapfoodmaybealreadytoohigh:MadCowDisease(BSE)incattle,salmonellainchickenandeggs,andwisteriaindairyproducts.Andifyouthinky
4、ou'llabandonmeatandbecomeavegetarian,youhavethechoiceofveryexpensiveorganically-grownvegetablesorasteadydietofpesticideseverytimeyouthinkyou'reeatingfreshsaladsandvegetables,orjusthavinganinnocentglassofwater!However,thereisanevenmoreinsidiouskindofpoll
5、utionthatparticularlyaffectsurbanareasandinvadesourdailylives,andthatisnoise.Burglaralarmsgoingoffatanytimeofthedayornightserveonlytoannoypassers-byandactuallyassistburglarstoburgle.Caralarmsconstantlyscreamatusinthestreetandareasourceofprofoundirritati
6、on.Arecentsurveyoftheeffectsofnoiserevealed(surprisingly?)thatdogsbarkingincessantlyinthenightratedthehighestformofnoisepollutiononascalerangingfrom1to7.Thesurveyrevealedalargenumberofsourcesofnoisethatwereallydislike.Lawnmowerswhiningonasummer'sday,lat
7、e-nightpartiesinapartmentblocks,noisyneighbors,vehiclesofalkinds,especiallylargecontainertrucksthunderingthroughquietvillage,planesandhelicoptersflyingoverhead,largeradioscarriedroundinpublicplacesandplayedatmaximumvolume.Newtechnologyhasalsomadeitsownc
8、ontributiontonoise.Alotofpeopleobjecttomobilephones,especiallywhentheyareusedinpublicplaceslikerestaurantsoronpublictransport.Loudconversationsonmobilephonesinvadeourthoughtsorinterruptthepleasureofmeetingfriendsforaquietchat.The
