会计学GreenhouseWhatisgreenhouse?Greenhousegas:Thenaturalgreenhouseeffectiscrucial（决定性的）formaintainingthepropertemperatureneededtosustain(支持、支撑）lifeonEarth.GlobalwarmingTemperatureAworldwidegreenhouseeffectmightproduceadangerouslywarmerworld.Sincethelate19thcentury,theaverageglobaltemperaturehasincreasedbetween0.3°Cand0.6°C.Internationally,2010wasthehottestyearonrecordsinceofficialweatherrecordsfirststartedbeingkeptbytheBritishinabout1860.Estimates（估计）ofglobalaveragetemperatureshaveprojectedanincreaseofasmuchas5°Cbeforetheyear2100.Suchariseinglobaltemperaturewouldproducenewpatternsandextremedroughtandrainfall,whichwouldseriouslydisruptfoodproduction.ThiscouldpotentiallycrippletheNorthAmericancornbelt,whichproducesmuchoftheworld'sgrain,leadingtomuchhigherfoodprices,andevenlessfoodfortheThirdWorldthantheyalreadyhave.Theotherseriousworryisthatrisingsealevelsfromthemeltingofthepolaricecouldseverelyfloodmanycountries.Ariseinsealevelsofonemetre,whichmanyexpertsarepredictingbytheyear2100(andsomeassoonas2030),wouldflood15percentofEgypt（埃及）,and12percentofBangladesh(孟加拉国).TheMaldives(马尔代夫）intheIndianOceanwouldalmostcompletelydisappear.Whatarethefactors?Whathasbeendonetosettleit?AOSIS(小岛国联盟):Mostofthecountrieswhichwouldsuffermostlyfromariseinsealevelsarethepoorislandstates,sotheislandsintheCaribbean（加勒比海的）,SouthPacific（太平洋的）,Mediterranean（地中海的）andIndianOceanhaveformedtheAlliance（联盟）ofSmallIslandStates,AOSIS,sotheyhavealoudervoiceininternatioanlpoliticsandcanmakethericherdevelopedworldlistentotheirproblems.Whatshouldwedo:*Trytobeavolunteers*Supportenvironmentalprotectioncommonwealth*Simplelife!~~*………Aslongaswetrytochange,wewillsucceed!Thankyou！