If a project’s management of the biomass feedstock before long-term storage leads to non-CO₂ emissions, these must be accounted for. Non-CO₂ emissions such as methane or nitrous oxide could be produced via processes like anaerobic decomposition during feedstock storage and transport, or during the management of biogenic waste products. If applicable, venting, leaking, or incompletely flaring methane produced during the biomass transformation process must also be considered. GWP assumptions used to incorporate these emissions into the calculation of net carbon removal should be transparently disclosed.