Participated · Series A · Dec 2022

Eion develops and deploys enhanced rock weathering (ERW) on agricultural lands, applying olivine and routine farming practices to capture carbon while balancing soil pH. The company holds an industry-first patent for directly measuring carbon removed by mineral weathering in soils using immobile trace elements, and relies on routine soil samples and standard equipment to monitor removal and soil conditions. Led by CEO Anastasia Pavlovic, Eion emphasizes integrating with existing agricultural systems to scale without compromising safety or rigor. The company is focused on commercial deployment, delivering against new contracts, and continuing R&D to improve measurement and application methods. Eion is targeting to deliver 10 million tons of permanent carbon removal annually starting in 2030 and aims to create stable jobs in rural communities. Eion commercializes CarbonLock, a pulverized olivine soil amendment that sequesters CO2 via enhanced rock weathering (one ton applied can absorb one ton of CO2). The olivine is mined in Norway, shipped to Mobile, Alabama, crushed to increase surface area, and applied to fields typically once every two years at roughly two tons per acre. CarbonLock also acts as an agricultural lime, reducing soil acidity, which helps farmer adoption. Eion validates sequestration by tracking the fate of olivine through measurements of magnesium and rare earth elements and monitors for heavy metals like nickel and chromium. The company is finalizing its methodology, expanding operations, and planning to build a mill to scale production. Current revenues have been supported by carbon-credit buyers such as Stripe’s climate program; Eion is exploring additional revenue sources including payments from farmers or food brands, potential federal cost-sharing, and has an off-take agreement with mineral supplier Sibelco.