Carbon credit platform Isometric has partnered with global mining major Anglo American to issue scientifically rigorous Enhanced Weathering (EW) credits, marking a significant step in scaling permanent carbon removal. The agreement covers Project Earthstone in Brazil, a collaboration between Anglo American and climate-tech firm ZeroEx, which will use mining by-products as feedstock for EW deployment.
By repurposing mine tailings and other by-products, mining operators could play a pivotal role in accelerating carbon removal technologies such as EW and mineralisation. Located near agricultural land, Project Earthstone already has stockpiles of magnesium-rich rock with the potential to remove up to 15 million tonnes of CO₂ from the atmosphere. The material not only draws down carbon but also enhances soil health and crop yields, particularly in magnesium-deficient soils.
Tony Oehm, CEO of ZeroEx, said: “Enhanced Weathering can only scale through close partnership with the mining industry. By combining Anglo American’s operational expertise with ZeroEx’s science and MRV technology, we can transform mining by-products into feedstocks that remove carbon at scale, improve soils, and support farmers.”
Katie Fergusson, SVP Studies & Development at Anglo American, added: “The primary objective of the Project Earthstone trial is to demonstrate we can generate Enhanced Rock Weathering carbon credits at scale, in a safe, fully verifiable and responsible manner. Our collaboration with Isometric and ZeroEx marks an important milestone toward that goal.”
Isometric will issue the credits under its own standard and the Enhanced Weathering in Agriculture Protocol, which is recognised as one of the most robust scientific frameworks available. Measurement, reporting and verification (MRV) data will be managed via the Isometric Certify platform, ensuring transparency and credibility.
The partnership underscores the growing importance of high-quality, science-backed credits in building confidence and scaling the carbon removal market responsibly.
