Puro.earth plans to update its Carbonated Materials methodology as part of the Puro Standard’s regular review cycle, reflecting advances in science, implementation experience and recent updates to its General Rules.
The revision will apply to the Puro Standard Carbonated Materials methodology (Edition 2022 v.3) and is intended to integrate the latest scientific insights, align with updated Puro Standard requirements, and strengthen guidance for high-integrity mineral carbonation projects. Carbonated materials are increasingly viewed as a durable pathway for carbon dioxide removal, with growing interest from developers, buyers and researchers working on mineral carbonation in industrial settings.
Projects already undergoing audit or verification under the current methodology will continue through certification as planned, under existing requirements.
Puro.earth said the update is being undertaken to ensure the methodology remains scientifically robust, operationally clear and consistent with recent changes to Puro Standard documents, including General Rules 4.2.
The revision is expected to introduce more detailed requirements across several areas, including the scope and eligibility of mineral carbonation activities, quantification and measurement approaches, and the calculation of project emissions using life-cycle analysis. Additional focus areas include alignment with updated Puro rules, safeguards and permanence, end-of-life handling and reversal risk, as well as clearer treatment of uncertainty, data quality and transparency.
The update process is scheduled for the first half of 2026. A public consultation period of three weeks is tentatively planned for April 2026 and will include a recorded public webinar.
In parallel, Puro.earth will convene a dedicated expert working group on industrial mineral carbonation to support the revision process. The group will review draft revisions, participate in three to four workshops on key methodological topics, and help identify areas where additional guidance would improve usability and scientific rigour. Applications to join the working group are open until 10 March.
Following the consultation, the revised methodology will be submitted to Puro’s independent Scientific Advisory Board for approval. Subject to approval, deployment of the updated Carbonated Materials methodology is expected to begin in the second half of 2026, with transition dates to be confirmed.
