英语考试
TheatmosphereisablanketofgasesaroundtheEarth,Forthousandsofyearsthesegaseshavekepttheplanet'stemperatureatabout15°C.How?Bytrappingsomeofthesun'sheat,Butnow,becauseofpollution,therearemoreandmorehotgasesreleasedintotheatmosphere,ThismeansthattheEarthisgettinghotter,Agreenhousebecomeshotfortheatmosphere,ThismeansthattheEarthisgettinghotter,Agreenhousebecomeshotforthesamereason,Itsglassletsthesun'sheatpassthrough,thenstopssomeofitfromleaving,That'swhyscientistscalltheproblemoftheEarth'srisingtemperature"theGreenhouseEffect."
ManyscientistsagreethattheGreenhouseEffectwilladdbetween1.5°C-4°CtotheEarth'stemperatureby2030,Thiswillchangetheweathereverywhere,Forexample,theiceattheNorthandSouthpoleswillstarttomelt,Andwhenthathappens,theleveloftheseawillrise,Ifitrisesonemetreby2030therewillbeseriousfloodsinmanycountries.
Thenthereistheproblemoffood,whentheclimatechangestherewillbelessfoodintheworld,AtthemomentareasliketheMidwestofAmericaandcentralRussiagrowalotofwheat,InthefuturethatmaychangewhentheUSAandRussiabecometoodryforfarming,Othercountries(likeCandaandSweden)willbecomewetter,butthatwon'thelp,Thesoilthereisn'tasrich,Itwon'tbepossibletogrowthesameamountoffoodasbefore.
Wecan'tstoptheGreenhouseEffect,However,wecanslowitdownifweuselessfossilfuel,protectrain-forests,usemorenaturalenergyfromthesun,seaandwind,andbanFreoninourlives.
26.whyistheearthgettinghoter?
a.theatmospherearoundtheearth
b.airpollution
c.morehoygasesintotheatmosphere
d.thsunisgettinghotter
27whichstatementisuntrueforthegreenhousesffect
a.tochargetheeatherthroghouttheeffect
b.icewillstoptomelt
c.thenorthandsouthpolesstarttomelt
d.seriousfloodstakeplace
28.whentheclimatechanges,thendollowstheproblemof_.
a.environmentb.foodc.employmentd.energy
29whichcountrieswilbecomewetterthantheyusedtobe?
atheUSAandRUSSIAb.americaandcanadac.europeansd.swe