TowardshydrogendefinitionsbasedontheiremissionsintensityTheIEAexaminesthefullspectrumofenergyissuesincludingoil,gasandcoalsupplyanddemand,renewableenergytechnologies,electricitymarkets,energyefficiency,accesstoenergy,demandsidemanagementandmuchmore.Throughitswork,theIEAadvocatespoliciesthatwillenhancethereliability,affordabilityandsustainabilityofenergyinits31membercountries,11associationcountriesandbeyond.Thispublicationandanymapincludedhereinarewithoutprejudicetothestatusoforsovereigntyoveranyterritory,tothedelimitationofinternationalfrontiersandboundariesandtothenameofanyterritory,cityorarea.Source:IEA.InternationalEnergyAgencyWebsite:www.iea.orgIEAmembercountries:AustraliaAustriaBelgiumCanadaCzechRepublicDenmarkEstoniaFinlandFranceGermanyGreeceHungaryIrelandItalyJapanKoreaLithuaniaLuxembourgMexicoNetherlandsNewZealandNorwayPolandPortugalSlovakRepublicSpainSwedenSwitzerlandRepublicofTürkiyeUnitedKingdomUnitedStatesTheEuropeanCommissionalsoparticipatesintheworkoftheIEAIEAassociationcountries:ArgentinaBrazilChinaEgyptIndiaIndonesiaMoroccoSingaporeSouthAfricaThailandUkraineINTERNATIONALENERGYAGENCYTowardshydrogendefinitionsbasedontheiremissionsintensityAbstractPAGE|3IEA.CCBY4.0.AbstractTowardshydrogendefinitionsbasedontheiremissionsintensityisanewreportbytheInternationalEnergyAgency,designedtoinformpolicymakers,hydrogenproducers,investorsandtheresearchcommunityinadvanceoftheG7Climate,EnergyandEnvironmentalMinisterialmeetinginApril2023.ThereportbuildsontheanalysisfromtheIEA’sNetZeroby2050:ARoadmapfortheGlobalEnergySectorandcontinuestheseriesofreportsthattheIEAhaspreparedfortheG7onthesectoraldetailsoftheroadmap,includingtheAchievingNetZeroElectricitySectorsinG7Members,AchievingNetZeroHeavyIndustrySectorsinG7MembersandEmissionsMeasurementandDataCollectionforaNetZeroSteelIndustryreports.Thisreportassessesthegreenhousegasemissionsintensityofthedifferenthydrogenproductionroutesandreviewswaystousetheemissionsintensityofhydrogenproductioninthedevelopmentofregulationandcertificationschemes.Aninternationallyagreedemissionsaccountingframeworkisawaytomoveawayfromtheuseofterminologiesbasedoncoloursorothertermsthathaveprovedimpracticalforthecontractsthatunderpininvestment.Theadoptionofsuchaframeworkcanbringmuch-neededtransparency,aswellasfacilitatinginteroperabilityandlimitingmarketfragmentation,thusbecomingausefulenablerofinvestmentsforthedevelopmentofinternationalhydrogensupplychains.TowardshydrogendefinitionsbasedontheiremissionsintensityAcknowledgementsPAGE|4IEA.CCBY4.0.AcknowledgementsTowardshydrogendefinitionsbasedontheiremissionsintensitywaspreparedbytheEnergyTechnologyPolicy(ETP)DivisionoftheDirectorateofSustainability,TechnologyandOutlooks(STO)oftheInternationalEnergyAgency(IEA).TheprojectwasdesignedanddirectedbyTimurGül,HeadoftheEnergyTechnologyPolicyDivision.UweRemme,HeadoftheHydrogenandAlternativeFuelsUnit,andJoseMiguelBermudezMenendezco-ordinatedtheanalysisandproductionofthereport.TheprincipalIEAauthorsandcontributorswereSimonBennett,StavroulaEvangelopoulou,MathildeFajardy,CarlGreenfield,FrancescoPavanandAmaliaPizarroAlonso.Severalcolleaguesacrosstheagencycontributedanalyticalinput,includingTomásdeOliveiraBredariolandJérômeHilaire.LaurentAntoni,fromtheInternationalPartnershipforHydrogenandFuelCellsintheEconomy(IPHE)wasalsoacontributorandauthorofthereport.Thefollowi...