Only standards, certification schemes or regulations that include an explicit GHG threshold are listed. Guarantees of origin schemes are excluded since they do not include GHG thresholds. CCUS = carbon capture, utilisation and storage; SMR = steam methane reforming; H2 = hydrogen; NH3 = ammonia. The “Demand sector” column indicates whether the certification system or regulation is limited to using the hydrogen in a specific sector.
* These are fuel emission standards based on a credit system that have a GHG reduction target for the overall fuel supply to the transport sector rather than the individual fuels or production pathways.