Top: King County, Washington’s South Treatment Plant, which anaerobically digests biosolids and then upgrades the biogas (on right) to RNG. Photos courtesy of King County

Ahead of COP 30 in Brazil, coordinators of an international campaign, Let Green Gas Count, released a joint letter calling for the Greenhouse Gas Protocol — the most widely used framework for greenhouse gas accounting in the world — to explicitly recognize market-based instruments for renewable gases such as biogas and renewable natural gas (RNG). Due for revision by 2028, the GHG Protocol framework guiding 97% of the Fortune 500 does not explicitly allow companies to claim credit for purchasing green gas certificates among other tools, despite repeated calls from over 230 organizations. According to the International Energy Agency (IEA)’s 2025 Outlook for Biogas and Biomethane, policymakers around the world have introduced over 50 new policies to support biogas uptake since 2020. In the EU, renewable gases like biogas, RNG and e-methane are already recognized as having a vital role to play in decarbonizing the economy and supporting European security of supply. But despite consensus on their benefits, only around 5% of the total potential for sustainable production of biogas and RNG is currently being used, notes the campaign.