简介：Globalwarminghasgreatlyconcernedthewholeworld.Owingtothelimitationwecurrentlyhave,itisstilldifficulttocompletelyunderstandthemechanismandphysicalscienceofclimatechange.Nowbothcertaintyanduncertaintycoexistintheunderstandingofclimatewarming.Thispaperaimstosummarizecertaintiesanduncertaintiesinclimate-warmingstudies,whichfocusonsevenkeyproblemsrelatedtohumanactivities,namely,globalwarming,atmosphericconcentrationsofgreenhousegases,relationshipbetweengreenhousegasemissionsandclimatewarming,climatemodels,futureclimatechange,2?warmingthresholdandtippingpointintheEarth’ssystem.Weshouldcomprehensivelytakeintoaccountthelevelofcertaintyanduncertaintyinourunderstandingofclimatechangewhileadaptingtoandmitigatingglobalwarmingandadjustingourindustrialstructuresaccordingly.Thiswouldallowustorespondtochangewithcertainty,whileavoidingtherisksassociatedwithuncertainty.
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