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Emission Removal
Oxford Category:
Buyer Protection
Bought by
1,000
tCO2e removed annually - Carbon sequestered through accelerated rock weathering on agricultural lands
10,000
years of carbon durability - Long-term carbon storage as stable bicarbonate in oceans and soils
22,854
metric tons of basalt spread in 2024 - Supporting sustainable farming practices and soil health enhancement across 18 partner farms
What is Enhanced Rock Weathering?
Enhanced Rock Weathering (ERW) is a natural process accelerated by human intervention to remove carbon dioxide (CO2) from the atmosphere and store it long-term. When certain types of rocks, such as basalt, are exposed to air and water, they undergo a chemical reaction called weathering. During this process, CO2 from the atmosphere reacts with the minerals in the rock, forming bicarbonate ions that eventually make their way to the ocean, where they are stored for tens of thousands of years.
ERW projects speeds up this natural process by spreading finely crushed basalt or similar - a byproduct of local quarries - onto agricultural lands. Instead of leaving CO2 to accumulate in the atmosphere, the crushed rock reacts with rainwater and soil, converting atmospheric CO2 into stable bicarbonate. This process not only sequesters carbon but also improves soil health by increasing fertility, water retention, and crop yields.
Without intervention, rock weathering occurs slowly over geological timescales. By grinding the rock into fine powder and spreading it on fields, ERW projects enhance the surface area available for reactions, significantly accelerating carbon removal.
Certification Standard
This project is verified by Puro.Earth: the world’s leading crediting platform for engineered carbon removal. They are on a mission to mobilize the economy to reward carbon net negative emissions. They help voluntary corporate buyers accelerate carbon dioxide removal (CDR) at an industrial global scale, through the Puro Standard. It’s the world’s first standard focused solely on carbon removal that durably stores carbon from the atmosphere for 100+ years.
Location
Regreener's Rating
The ZeroEx ERW project exemplifies how innovative, science-backed carbon removal technologies can deliver scalable, high-impact climate solutions. By accelerating the natural weathering process through the application of basaltic rock powder on agricultural lands, the project removes 75,000 tons of CO2-equivalent emissions annually. This approach addresses a critical challenge in carbon management by converting atmospheric CO2 into stable bicarbonate, which is securely stored for over 10,000 years. The durability and permanence of this method make it a cornerstone in the global transition to net-zero. Beyond its direct climate impact, the project aligns with multiple Sustainable Development Goals. It improves local soil health and agricultural productivity by enhancing fertility, water retention, and crop yields, thereby supporting food security and sustainable farming practices. The project also fosters economic growth by creating jobs in logistics, agriculture, and research, while engaging local farmers and communities through transparent collaboration and feedback channels. ZeroEx’s commitment to rigorous monitoring, innovative MRV techniques like Self-Integrating Accumulators (SIAs), and Isometric certification ensures transparency, accuracy, and long-term climate benefits. The project’s use of quarry byproducts further embodies circular economy principles, reducing waste and promoting resource efficiency. For corporations and investors prioritizingd measurable, low-risk climate action, ZeroEx offers a credible, high-impact solution. It demonstrates that well-executed, science-driven projects can achieve meaningful progress without relying on unproven innovations. In an era where credibility, scalability, and sustainability are essential, this project stands as a benchmark for operational excellence - delivering tangible environmental, social, and economic co-benefits while advancing global net-zero goals.








