îâêòð§ó¦(greenhouseeffect)
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englishversion£º
greenhouseeffect
warmingoftheearth'ssurfaceandloweratmospherethattendstointensifywithanincreaseinatmosphericcarbondioxideandcertainothergases.visiblelightfromthesunheatstheearth'ssurface.partofthisenergyisreradiatedintheformoflong-waveinfraredradiation,muchofwhichisabsorbedbymoleculesofcarbondioxideandwatervaporintheatmosphereandreradiatedbacktowardthesurfaceasmoreheat.thisprocessisanalogoustotheglasspanesofagreenhousethattransmitsunlightbutholdinheat.thetrappingofinfraredradiationcausestheearth'ssurfaceandloweratmospheretowarmmorethantheyotherwisewould,makingthesurfacehabitable.theincreaseinatmosphericcarbondioxidecausedbywidespreadcombustionoffossilfuelsmayintensifythegreenhouseeffectandcauselong-termclimaticchanges.anincreaseinatmosphericconcentrationsofothertracegasessuchaschlorofluorocarbons,nitrousoxide,andmethanemayalsoaggravategreenhouseconditions.itisestimatedthatsincethebeginningoftheindustrialrevolutiontheamountofatmosphericcarbondioxidehasincreased30%,whiletheamountofmethanehasdoubled.todaytheu.s.isresponsibleforaboutone-fifthofallhuman-producedgreenhouse-gasemissions.seealsoglobalwarming.
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