Nitrous oxide (N2O) abatement in nitric acid production projects only take up a small portion of the voluntary carbon market (VCM), but they have experienced significant changes since their inception. Their current status in the market is in flux with the development of Article 6.4 and the Integrity Council for the Voluntary Carbon Market Core Carbon Principles (ICVCM CCP) label review. This final blog in our initial Nitric Acid series digs into the evolution of nitric acid methodologies and their status today.