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Unit2Task1:【答案】June5th，theUnitedNations，1972，worldleadersandcitizenshowtoprotecttheenvironment，SanFrancisco,California，PlanthePlanet，GreenCities，mostpeoplenowlive，morethan75percent，theformervicepresident，musicconcerts，parades，treeplantings，representativesfrommanyenvironmentalorganizations【原文】EveryyearonJunefifthmanycountriescelebrateWorldEnvironmentDay.TheUnitedNationsestablishedthisspecialdayinnineteenseventy-twotogetpeopletothinkabouttakingcareoftheplanet.FaithLapidustellsusmore.“PubliceventsforWorldEnvironmentDayaretakingplacefromJunefirstthroughJunefifth.Theeventsandconferenceshelpteachworldleadersandcitizenshowtoprotecttheenvironment.“EveryyearWorldEnvironmentDayiscelebratedinadifferentcity.ThisyearitisbeingheldinSanFrancisco,California.ThisisthefirsttimesincethebeginningofWorldEnvironmentDaythattheconferenceisbeingheldintheUnitedStates.ThemainmessageofWorldEnvironmentDaythisyearis‘PlanforthePlanet’.Theeventsandconferenceswillshowhowtohave‘GreenCities’.Thismeansthatpeoplewilltalkaboutwaysthatcitiescanhavehealthyenvironments.“Mostpeopleintheworldliveincities.Thismakesthemespeciallyimportantareasofenvironmentalconcern.Citiesusemorethanseventy-fivepercentoftheworld'snaturalresourcessuchaswaterandgasoline.WorldEnvironmentDaywillcenteronhowpeopleincitiescanworktogethertohelpsavetheplanet.“SanFranciscoisholdingpublictalkstodiscusspollutionreduction,cleanenergysourcesandtheimportanceofhealthyparksandgardens.Specialexpertsareamongthespeakers.Forexample,formervice-presidentAlGorewilltalkaboutclimatechange.Therealsoarefuneventssuchasmusicconcerts,movies,artshows,parades,bicycleridesandtreeplantings.Localfarmersandrestaurantownerswillservefoodthathasbeennaturallygrown.“TheMayorofSanFrancisco,GavinNewsom,invitedcityleadersfromallovertheworldtoattendthisconferenceandshareideas.Representativesfrommanyenvironmentalorganizationsalsoareattending.TheUnitedNationshopestocreateaninternationalagreementthatcountriesandcitizenswillfollowtohelpimprovetheEarth'senvironment.”Task2:【答案】A.1)d2)a3)b4)cB.1)Occupationalnoise2)Aircraftnoise3)Trafficnoise【原文】Thesenseofsoundisoneofourmostimportantmeansofknowingwhatisgoingonaroundus.Soundhasawastedproduct,too,intheformofnoise.Noisehasbeencalledunwantedsound.Noiseisgrowinganditmaygetmuchworsebeforeitgetsandbetter.Scientists,forseveralyears,havebeenstudyinghownoiseaffectspeopleandanimals.Theyaresurprisedbywhattheyhavelearned.Peaceandquietarebecominghardertofind.Noisepollution—thecrashing,squeaking,banging,hammeringofpeople—isnojoke.Itisathreatthatshouldbelookedatcarefully.Soundismeasuredinunitscalled“decibels”.Atalevelof140decibelspeoplefeelpainintheirears.Automobiles,trucks,buses,motorcycles,airplanes,boats,factories,bands—allthesethingsmakenoise.Theybothernotonlyourears,butourmindsandbodiesaswell.Thereisasayingaboutitbeingsonoisythatyoucan’thearyourselfthink.Doctorswhostudynoisebelievethatwemustsometimeshearourselvesthink.Ifwedon’twemayhaveheadaches,otherachesandpains,orevenworsementalproblems.Noiseaddsmoretensiontosocietythatalreadyfacesenoughstress.Butnoiseisnotanewproblem.InancientRome,peoplecomplainedsomuchaboutnoisethatthegovernmentstoppedchariotsfrommovingthroughthestreetsatnight!Noisecanbeseparatedintoafewgeneralgroups.ThefollowingexamplesaretakenfromhearingsbeforetheUSSenateSubcommitteeonAirandWaterPollutionin1970.Occupationalnoise—Factoryworkerswhoalwayshearnoisehavepoorerhearingthanothergroups.Aircraftnoise—Aroundairportsoronairroutesthenoiseofairplanestakingoffandlandingcausesthegreatestcomplaints.Trafficnoise—Awayfromthenoiseofplanes,trafficsoundsbreakinonourpeaceandquiet.Trucksandmotorcyclescausethemostproblems.Task3:【答案】1)F2)F3)T4)F5)T6)F7)F8)T9)T【原文】Weusuallythinkofpollutionasaharmfulwastesubstancethatthreatenstheairandwater.Butsomepeoplehavebecomeconcernedaboutanotherkindofpollution.Itcanbeeverywhere,dependingonthetimeofday.Anditwasnotthoughtofasasubstance.Itislight.Theideaoflightpollutionhasdevelopedwiththeincreaseoflightsincities.Inmanyareas,thislightmakesitdifficultorimpossibletoobservestarsandinthenightsky.In1998,theInternationalDark-SkyAssociationformed.Thisorganizationwantstoreducelightpollutioninthenightsky.Italsourgestheeffectiveuseofelectriclighting.Thereareanumberofreasonswhylightpollutionisimportant.OnehasbecomeclearattheMountWilsonnearLosAngeles,California.MountWilsonObservatorywashometothelargesttelescopesintheworldduringthefirsthalfof1900.Duringthatperiod,LosAngelesgrewtobecomeoneofAmerica'sbiggestcities.Today,lightfromLosAngelesmakesthenightskyaboveMountWilsonverybright.Itisnolongeranimportantresearchcenterbecauseoflightpollution.Lightpollutionthreatenstoreducethescientificvalueofresearchtelescopesinotherimportantobservatories.TheyincludeLickObservatorynearSanJose,CaliforniaandYerkesObservatorynearChicago,Illinois.Lightpollutionistheresultofwastedenergy.BrightlightshiningintotheskyisnotbeingusedtoprovidelightwhereitisneededonEarth.Poorlydesignedlightingcausesagreatdealoflightpollution.Lightsthatarebrighterthannecessaryalsocauselightpollution.Recently,twoIt