The Certificate of Guarantee of Origin for Biomethane has just been definitively regulated by the ANP. With Resolutions No. 995 and No. 996, published in March 2026, Brazil created a new financial instrument: an asset that proves the renewable origin of the gas, can be traded separately from the physical molecule and serves both to meet mandatory regulatory targets and voluntary corporate decarbonization strategies. For most investors, CGOB is still unknown. This article explains how it works, what differentiates it from RenovaBio's CBIOs, what the risks are and why 2026 could be the inflection point for anyone who wants to position themselves in this market before it matures.
