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21/02/2014, 12:20
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Carbondioxide(CO
2
)isabsorbedby land andvegetationthroughtheprocessofphotosynthesis.The
netemissionsarenegative(sequestration)andsubstantial,offsettingapproximately884MMTCO
2
E,or
approximately13%oftotalemissions in 2006.
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Thecarbonsequestrationandstorageprovidedby
land canbepreservedthough sustainable land management practices, andcanbeenhancedby
restorationof land, suchasreforestationofcontaminated land.
Theemissionsestimateforthe land basedcarbonsinkisgivenbytheInventory.Specifically,Chapter7,
Land Use, Land UseChange,andForestry,providesanassessmentofthenetGHGfluxresultingfrom
theusesandchanges in land typesandforests in theU.S.,includingnetemissionsfromforestland
remainingforestland,croplandremainingcropland, land convertedtocropland,grasslandremaining
grassland, land convertedtograssland,settlementsremainingsettlements,landfillyardtrimmings,and
...
Sustainable land use practices includethosethatpromotethe
sustainable useanddevelopmentof land (includingmanaging land
foragriculturalandforestrypurposes),andminimizinggreenfield
development.Between1982and2003,theU.S.population
increasedby25%.
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Duringthesameperiod,theamountof
developed land increasedby48%—almostdoublepopulation
growth.
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Astheamountofgreenfields(orpreviouslyundeveloped
land) thatisdevelopedincreases,ourpopulationbecomesmore
dispersedandpeopledrivelongerdistancesbetweenhome,work,
andrecreationallocations.Duringthissameperiodoftime,U.S.
...
REDUCINGORAVOIDINGGHGEMISSIONSTHROUGH LAND MANAGEMENT PRACTICES
Land management describeshowwemanageanduse land toprovideopenspaceandhabitat,food,
naturalresources,andplacesforpeopletolive,work,andrecreate.EPApromotesintegrated land
management strategiesthatuse land asproductivelyandsustainablyaspossiblebypromotingsmart
growth,preventingandminimizingtheoccurrenceofcontaminationandbycleaningup,reusing,and
restoringcontaminated land forbeneficialreusebycommunities.
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Asdescribed in Box7, land management hasthreekeycomponents: land protection, sustainable land
use,and land revitalization.Similartothematerials management approachesthatcanbeused in the
materialflow, land management approachescanbeusedtoreduceGHGemissionsbyimproving
practices withinoracrosseachofthesecomponents. Land protection practices limithowmuch land is
contaminatedeachyear.When land iscontaminated,itshouldbe
cleaneduptolevelsprotectiveofhumanhealthandthe
environment.
Land Protection: prevent land from
becoming contaminated.
Sustainable Land Use: use of land in
such a way that preserves its value for
future uses. Preserving pristine land
resources minimizes...