Removing carbon dioxide through chemical reactions that occur when finely ground silicate rock is spread on farmland.
Eion delivers permanent carbon removal at scale—with rigorous scientific verification—while providing economic and environmental benefits to farmers and agricultural businesses in rural areas.
This is achieved through the process of enhanced rock weathering (ERW), which sees local partners transport and apply Eion’s crushed rock onto farmland. In the presence of naturally occurring moisture and acidity, the rock dissolves, causing carbon dioxide to be pulled from the atmosphere into a carbon-rich solution. Rivers carry this solution to the ocean, where it restores the ocean’s alkalinity, completing the natural process. As a co-benefit, the minerals in the crushed rock further fertilize soil and reduce nitrate leaching, improving soil health and crop yields.
While measuring the carbon captured via ERW has historically been difficult, Eion has developed a novel Measurement, Reporting, and Verification (MRV) approach using trace mineral fingerprints in standard soil samples to quantify the carbon removed through direct measurement.
Eion’s technology works within existing on-farm infrastructure, making it a ready-to-go, climate-smart solution for American farmers, who can feel empowered to begin capturing carbon, earn compensation for this important service, and differentiate their crops with added value.
N.B.: While atmospheric CO2 is removed continuously for approximately 24 months after rock spreading, Eion conducts sampling at the 6-9 month mark, with the expectation that 50-70% of the weathering has occurred at this stage. Eion's statement of 'Vintage Year' represents the calendar year in which the post-application sampling of the rock takes place, and therefore the year in which most of the carbon removal associated with its spreading occurs.