... U.S.EPA.2008.InventoryofU.S.GreenhouseGas Emissions andSinks:1990‐2006.Availableat:http://www.epa.gov/climatechange /emissions/ usgginv_archive.html.ThisreportreliesontheInventorydatapublishedin2008;amorerecentversion,InventoryofU.S.GreenhouseGas Emissions andSinks:1990‐2007,waspublishedin2009andcanbefoundathttp://www.epa.gov/climatechange /emissions/ usinventoryr eport.html.37 Emissions from U.S.territoriesarecategorizedasaseparatesector,totaling1%oftotalU.S. emissions; becausethese emissions arenotallocated to economicsectors,theyarenotdescribedhere.U.S.EPA.2008.InventoryofU.S.GreenhouseGas Emissions andSinks:1990–2006.ExecutiveSummary,TableES‐7:U.S.GreenhouseGas Emissions Allocated to EconomicSectors(TgCO2Eq.)Availableat:http://www.epa.gov/climatechange /emissions/ usgginv_archive.html ... September2009SECTION2UNDERSTANDINGU.S.GHG EMISSIONS TheUnitedStatesannuallyreportsitsGHG emissions intheInventoryofU.S.GreenhouseGas Emissions andSinks.36TheInventorycomprehensivelyquantifiesourcountry’sprimaryanthropogenicsourcesandsinksofGHG emissions usingmethodologiesdevelopedbytheInternationalPanelonClimateChange(IPCC),inaccordancewithUnitedNationsFrameworkConventiononClimateChange(UNFCCC)nationalinventoryreportingguidelines,andallowsacomparisonoftherelativecontributionofdifferentemissionsourcesandgases to climatechange.In2006,theUnitedStateshadtotal emissions of7,054millionmetrictonsofcarbondioxideequivalent(MMTCO2E) from awiderangeofsources.SECTOR‐BASEDVIEWOFU.S.GHG EMISSIONS Inaddition to adetailedaccountingof emissions bysourcecategory,theinformationintheInventoryisalsosummarizedbyeconomicsector.In2006,34%of emissions wereallocated to theElectricPowerIndustry,28% to Transportation,19% to Industry,8% to Agriculture,6% to Commercial,and5% to Residential(seeFigure1).37Figure ... researchandanalysis to provideinformationonthe cost ofimplementingmaterialsandlandmanagementapproaches to reduce GHG emissions, to allowlocalities,tribes,states,andothers to makebetterdecisionsregardingtheirreturnoninvestmentandidentifyapproachesthatminimize cost. •...