... The ProvisionofFoodsliceof the piechartrepresents emissions associatedwithfoodproduction,processing,transport, and disposal, and iscomposedofaportionof emissions from alleconomicsectorsexceptResidential.Itincludesdirect emissions from agriculturalsources,agriculturalsectorelectricityuse,transportoffood‐relatedproducts(freight),wastewatertreatment(except for emissions from pulp and paper manufacturing and ethanolproduction), the consumptionoffuel and electricityinfood and beverageprocessing,leaksofhydrofluorocarbons(HFCs) from refrigerationequipment, and composting.Carbonsequestrationonagriculturallandsiscapturedin the landsinkdiscussedbelow.ProvisionofFoodisestimatedtoaccount for 895MMTCO2E,or13%,of2006U.S.GHG emissions. 42Notethat the U.S.GHG emissions presentedinFigures1through5represent emissions thatarereleaseddomestically. Emissions associatedwithgoods and servicesthatareproducedinothercountries(i.e., emissions associatedwithextractionofrawmaterials,processing, and productionofgoods and servicesoutside the UnitedStates)butconsumedin the UnitedStatesarenotcapturedin the U.S.Inventory, and thereforearenotreflectedhere.Correspondingly, the emissions associatedwithgoods and servicesproducedin the UnitedStatesthatareexported for consumptioninothercountriesareincluded.Manymaterialsmanagementstrategiesreduce emissions from productionofgoodsoutside the UnitedStates,butthosepotentialreductionsarenotreflectedinthisdocument.IfU.S. emissions werecalculatedusingatotallifecycleperspective,basedongoods and servicesconsumedratherthanproducedin the UnitedStates, the emissions associatedwithmaterialsmanagementwouldbegreaterthanisshowndueto the largequantityofgoodsthatareimported.43LandManagement The systems‐basedviewalsohelpsconvey the effectlandmanagementhasonU.S.GHG emissions. The landmanagementportionof the piechartshowninFigure4represents the emissions and sinksassociatedwithlandmanagementactivitiesin the UnitedStates,including emissions and sinksassociatedwith the preservationofgreenfields and changestolanduse and landmanagement,includinglanddevelopment,reuse, and restoration. ... included in the Inventory of U.S. Greenhouse Gas Emissions and Sinks, and is therefore depicted outside of the pie chart. It may include some overlap with the existing land sink value. Landmanagement emissions and sinksaredepictedasfourelementsin the systems‐basedpiechart. The emissions sinkprovidedbysoil and growingvegetationin the UnitedStatesisdepictedas the outerringof the piechart(LandSink).Also,therearetwoslicesin the piechartassociatedwithlandmanagement:Infrastructure,whichconsistsoflifecycleGHG emissions from constructing and maintainingroads and waterinfrastructure, and LocalPassengerTransport.Finally,anestimateof the emissions associatedwithGreenfieldDevelopmentisdepictedasafloatingpieslice.Furtherdescriptionofthesepiechartelementsfollows. ... September2009totalU.S. emissions. The carbonsinkisanetnumber. The magnitudegiven for the sinkisnetoftwosmallsourcesofpositive emissions from land and isdominatedby the negative emissions from growingforests and netincreasesinforestarea.Wehaveincludeditin the systems‐basedanalysisbecauseitshows the scaleof the land‐basedcarbonsinkcomparedwithtotalGHG emissions and the importanceoflandmanagementincarbonmitigationstrategies.ItisrepresentedgraphicallyinFigure4asasemi‐transparentringthaterases,ortakesaway, emissions from allotherslicesshownin the piechart.Therefore, the innerportionof the piechartinFigure4representsnet2006U.S.anthropogenic emissions (6,108MMTCO2E),while the entirepiechartrepresentsgross2006U.S. emissions (6,992MMTCO2E).45 The land‐basedcarbonsinkstores884MMTCO2E, the equivalentof13%of2006U.S.anthropogenicGHG emissions (see“LandSink”inFigure4 and Box2).46U.S....