We have not created our own methodology, but follow the most up-to-date and widespread frameworks:
In France: Méthode pour la réalisation des bilans d’émissions de gaz à effet de serre (BEGES v5) (French government, French Environment agency)
Internationally: GHG Protocol guidelines (WRI, WBCSD)
💡 The GHG Protocol is divided into several documents (Corporate Standard, Scope 2 Guidance, Corporate Value Chain (Scope 3) Standard) and is, for certain sectors, supplemented by other guidelines and set of rules (e.g. PCAF for financial institution)
Greenly’s Computations
To learn more about the details of Greenly’s calculations and methodology, links to articles published by our Research & Methodology team can be found below.
Transparency
Within these frameworks, some assumptions and methodological choices can still be necessary. For example, depending on the quality and availability of primary and secondary data, approximations and proxies are used. Moreover, not all scenarios are covered in these guidelines. Hence, to a certain extent, rules can be interpreted and extrapolated.
However, when we make these choices and assumptions, we always bear in mind the spirit of the guidelines and disclose them explicitly in the GHG inventory report.
Emission factors
Emission factors used to compute GHG emissions are provided by reliable and widespread databases (ADEME, EPA, UK Conversion Factors, IEA, IPCC, EcoInvent, EXIOBASE / USEEIO, EPD, scientific papers, supplier data, etc.).
When certain emission factors do not yet exist, Greenly experts create new ones based on data published by public authorities, independent bodies, researchers, companies, etc.
Moreover, the sources and methodology used to compute our emission factors are always disclosed and shared with the client.
Can Greenly GHG inventories be audited?
Our platform is audit-ready, and some of our clients have already performed external audits - which is made possible thanks to the full transparency of calculations.