【Lastnight’smeteor(流星)showerleftmanypeopleinthecommunitydissatisfiedanddemandinganswers.AccordingtoGabeRothschildEmeraldValley’smayorpeoplegatheredinthesuburbsofthecitycarryingheavytelescopesexpecti】

　　Lastnight’smeteor(流星)showerleftmanypeopleinthecommunitydissatisfiedanddemandinganswers.AccordingtoGabeRothschildEmeraldValley’smayorpeoplegatheredinthesuburbsofthecitycarryingheavytelescopesexpectingtowatchthebrightlyburningmeteorspassingthroughthesky.Whattheyfoundinsteadwasaskysobrightenedbythecity’slightsthatitdarkenedthelightofthemeteorspassingoverhead.

　　“Myfamilywassofrustrated”admittedtownresidentDuaneCosby“Wewantedtomakethisanunforgettablefamilyoutingbutitturnedouttobeahugedisappointment.”

　　Astronomers—scientistswhostudystarsandplanets—havebeencomplainingaboutthisproblemfordecades.Theysaythatlightpollutionpreventsthemfromseeingobjectsintheskythattheycouldseequiteeasilyinthepast.Theycallonpeopleandthegovernmenttotakemeasurestofightagainstit.

　　Thereisyetapopulationbesidesprofessionalandamateurstarobserversthatsuffersevenmorefromlightpollution.Thispopulationconsistsofbirdsbatsfrogssnakesetc.Forexampleoutdoorlightingseverelyaffectsmigrating(迁徙的)birds.AccordingtotheInternationalDark-SkyAssociation“100millionbirdsayearthroughoutNorthAmericadieincrasheswithlightedbuildingsandtowers.”

　　Countlessmoreanimalcasualties(伤亡)resultfromtheuseofartificiallighting.Clearlypeopleenjoythebenefitsoflightingtheirevenings.Butsomescientiststhinkitcanbeharmfulforhumanstoo.Theyworrythatexposuretolightwhilesleepingcanincreaseaperson’schancesofgettingcancer.

　　EmeraldValleyisonlyonecommunitythatisbecomingawareofthenegativeeffectsoflightpollution.ForyearsFlagstaffArizonahasenforcedlightingregulationsinitscityinordertoassistastronomersattheLowellObservatory.Similareffortshavebeenmadeworldwideandamovementisunderwaytoremindustoturnofflightswhenwearenotusingthemsothatothercreaturescansharethenight.

　　【小题1】Ithappenedlastnightthat_____.

　　A．thecity’slightsaffectedthemeteorwatchingB．themeteorsflewpastbeforebeingnoticedC．thecitylightshowattractedmanypeopleD．themeteorwatchi