题目内容：
Questionsarebasedonthefollowingpassage:
Howcanwegetridofgarbage(垃圾)?Dowehaveenoughenergysourcestomeetourfutureenergyneeds?
Thesearetwoimportantquestionsthatmanypeopleareaskingtoday.Somepeoplethinkthatmanmightbeabletosolvebothproblemsatthesametime.Theysuggestusinggarbageasanenergysource,andatthesametimeitcansavethelandtoholdgarbage.
Foralongtime,peopleburiedgarbageordumped(倾倒)itonemptyland,Now,emptylandisscarce.Butmoreandmoregarbageisproducedeachyear.However,garbagecanbeagoodfueltouse.Thethingsingarbagedonotlooklikecoal,petroleum,ornaturalgas;buttheyarechemicallysimilartothesefossil(化石)fuels.Asweuseupourfossil-fuelsupplies,wemightbeabletousegarbageasanenergysource.
Burninggarbageisnotanewidea.Somecity'sinEuropeandtheUnitedStateshavebeenburninggarbageforyears.Theheatthatisproducedbyburninggarbageisusedtoboilwater.Thesteamthatisproducedisusedtomakeelectricityortoheatnearbybuildings.InPads,France,somepowerplantsburnalmost2millionmetrictonsofthecity'sgarbageeachyear.Theamountofenergyproducedisaboutthesameaswouldbeproducedbyburningalmostahalfmillionbarrelsofoil.
Ourfossilfuelsuppliesarelimited.Burninggarbagemightbeonekindofenergysourcethatwecanusetohelpmeetourenergyneeds.Thismethodcouldalsoreducetheamountofgarbagepilingupontheearth.
Whattwoproblemscanmansolvebyburninggarbage? A．Theshortageofenergyandairpollution
B．Theshortageofenergyandthelandtoholdgarbage
C．Airpollutionandtheshortageoffossilfuel
D．Airpollutionandtheshortageoflandtoholdgarbage
参考答案：
答案解析：