An ISO 14067 factor used to translate activity data into greenhouse-gas emissions.
Greenhouse gas emission factor is the conversion factor used to translate activity data, material flows, or process inputs into associated greenhouse-gas emissions. It is not direct measurement, and its source and representativeness can materially affect the footprint result.
This page follows ISO 14067:2018. Emission factors are method inputs; they should be documented with source, geography, technology, time period, and applicability wherever possible.
ISO 14067:2018 - Greenhouse gases — Carbon footprint of products
GHG emission factor
Reference: 3.1.2.7
This term originates in ISO 14067:2018 and/or ISO 14044 LCA methodology. It is used in EU product regulation — particularly under the EU Battery Regulation (PEF method for carbon footprint) and ESPR (environmental footprint) — because both regulations require lifecycle-based quantification of environmental impacts. Practitioners applying these regulations should be familiar with these LCA/PEF concepts to correctly scope, conduct, and verify product-level environmental assessments.
Implementation records should capture the emission-factor source, activity data, representativeness record, calculation method, geography, technology coverage, time period, unit, and link to the inventory flow being calculated.
Greenhouse gas emission factor is a secondary-data conversion control: the evidence consequence is that estimated emissions remain auditable back to the source factor and activity data that created them.