climate-change

[]ClimateChangeClimateChange1•Definition2•Reasons3•Mainexamples4•Resultstowardshuman&animalsDefinition:AccordingtoUNFCCC(UnitedNationsFrameworkConventiononClimateChange),climatechangereferstothatAfteraconsiderableperiodoftimeofobservation,theclimatechangeledbythehumans’directlyorindirectlyactivities,whichchangetheglobalatmosphericcomposition,besidesnaturalclimatechange.UNFCCCReasons:•Naturalfactors•Man-madefactorsGreenhousegasesreleasingTreescuttingMainexamples:GlobalWarmingmeansthat,inaperiodoftime,theraisingtemperatureofEarthatmosphereandtheOceans,whichismainlycausedbyman-madefactors.TheIceSheetsmeltdown.Mainexamples:AcidDeposition/AcidRainTheacidrainfallwhosePHvalueislessthan5.56,whichcorrodebuildings.Mainexamples:OzoneDepletion/OzoneHoleOzoneHoleTheexcessiveuseofCFCs(氯氟烃)isthemaincauseoftheOzoneHole.Anditmayincreasetherateofskincancer.Resultstowardshuman&animals:1.GlobalwarmingcausesthemeltingdownofHimalayasglaciers,andleadtotheriskofwaterstorage.Himalayasglaciers,whichiscalledAsianwatertower,arethesourceofmanymajorlargeriversofChinaevenAsia.Humanbeingsburnfossilfuelsandcausetheglobalwarming,makingglaciersmeltfaster.Accordingtocurrentglobalwarmingtrend,lessthan30years,80%oftheareaoftheHimalayanglacierswouldmeltout,whichworsentheserioussituationofChina’swaterstorage.Resultstowardshuman&animals:2.ExtremeWeatherBlizzard,storm,flood,drought,hail,lightning,typhoon……thesearenotonlythescenesindisastermovies,suchas2012,theDayAfterTomorrow,butalsoexistinourrealworld.Extremeweathers,inrecentyears,cometoEarthabnormalfrequently,andithavealotofthingtodowiththeglobalclimatechangerelated.DroughtinYunnan,2010icedisasterinHunan,2008Resultstowardshuman&animals:3.SealevelriseSealevelriseisthephenomenonofglobalsealevelriseduetotheclimatechange,meltofpolarglaciersandthethermalexpansionofupperseasurface.Tuvalu,isthefirstnationtomoveoutbecauseofsealevelrise.NowitisrelocatedtoNewZealand.Tuvaluisgoingtobeoverwhelmedbywater.Theplacesindanger!VeniceTheplacesindanger!MaldivesTheplacesindanger!GreatBarrierReefBeautifulcorallineTheplacesindanger!ShanghaiTheplacesindanger!NewYorkTheplacesindanger!MumbaiResultstowardshuman&animals:4.ThreattobiodiversityMostendangeredcreatures,about25%ofmammalsandlikely12%ofbirdsarefacingwithextinctionindecades.Thisisduetoclimatechange,affectingtheirhabitatsofwoods,wetlandandpasture,andthehumandevelopmentalsoblocktheymigratetootherplaces.RainforestofPuertoRicanFrogEarth，wheretogo?Takeinaction，GreenourfutureLiveinharmony