Puro.earth’s Enhanced Rock Weathering (ERW) methodology has officially been recognized by the Frontier advance market coalition, allowing suppliers to follow this framework for certifying ERW credits as part of Frontier commitments.
This is the second Puro.earth methodology to be approved by Frontier, following the 2024 approval of Puro.earth‘s Geologically Stored Carbon methodology.
The Frontier advance market commitment unites a roster of leading brands such as Stripe, Google, Anthropic, JPMorgan Chase, and others on a mission of buying $1.8B of permanent CDR between 2022 and 2040.
This methodology green light confirms the confidence in Puro.earth’s expertise and rigor, which has also led to the entity being designated as a Leading Credit Issuer by Frontier back in April 2024.
With this motion, Frontier is recognizing the close collaboration between Puro.earth and the scientific community on Puro’s updated 2025 ERW methodology, which was fortified to ensure rigorous, accountable delivery.
Developed in collaboration with experts from academia, industry, and the non-profit sector, Puro.earth’s 2025 ERW methodology introduced significant updates for certifying ERW projects.
Key changes include requiring suppliers to combine two independent measurement methods for more detailed quantification, as well as clearer sampling requirements, improved accounting for CO2 losses, and a new framework for managing measurement uncertainty.
Relevant: The Puro Registry Hits 1 Million Retired CORCs
“Our ERW 2025 methodology underwent rigorous review by the scientific community, and Frontier’s approval is a strong signal that the bar we’ve set meets the most demanding procurement standards in the market for this pathway,” stated Puro.earth President Jan-Willem Bode.
“Together with the approval of our Geologically Stored Carbon methodology, this reflects the breadth and quality of the infrastructure Puro.earth provides across the engineered CDR sector,” he added.
When it comes to the Puro.earth methodology for Geologically Stored Carbon, Frontier approved this framework under the condition that direct air capture (DAC) projects must also comply with Frontier’s clean energy procurement principles, and for BECCS projects, the approval currently applies only to initiatives with minimal net new biomass use.
Read more: Puro.earth Launches Program To Certify Credits Under EU CRCF Regulation
