Eion Delivers First Enhanced Rock Weathering Carbon Removal to Stripe

Sets ambitious target of reaching supply of 10 million tons of annual carbon dioxide removal starting in 2030

Eion, a carbon removal company turning the proven science of enhanced rock weathering (ERW) into a scalable climate solution, today announced it completed partial delivery of a carbon removal purchase from Stripe. Validating Eion’s approach to ERW, including its patented approach of using direct soil sampling to measure carbon removal while continuously monitoring environmental conditions, Stripe has made an additional $1 million carbon repurchase from the company.

“The acceptance by Stripe signals that Eion’s approach has the stamp of approval from a carbon removal bellwether,” said Elliot Chang, cofounder and CTO of Eion. “By directly measuring our impact, Eion is turning ERW into a trusted, inherently scalable carbon removal solution while acting as responsible land stewards.”

The delivery of approximately 50 tons came from applying and weathering olivine, a silicate material that safely captures carbon and stores it permanently. Eion's direct measurement process uses actual results to account for how ERW works in the field. Using existing soil sampling practices and standard lab equipment and methods, Eion can uphold scientific rigor and responsibly scale enhanced rock weathering.

"Eion's delivery underscores the opportunity for enhanced rock weathering to become a scalable solution for permanent carbon removal," said Joanna Klitzke, Procurement and Ecosystem Strategy Lead at Stripe Climate. "Their conservative measurement methodology, thoughtful ecosystem monitoring, and comprehensive field trials demonstrate Eion’s commitment to advancing field weathering as a climate solution."

Further validating the company’s scientific progress, in August, environmental journal Global Change Biology published a peer-reviewed paper co-authored by Eion and leading academic experts from the University of Illinois Urbana-Champaign (UIUC) and the Leverhulme Center for Climate Mitigation. The research, representing one of the longest-running trials on enhanced rock weathering, shows the opportunity for ERW to be a powerful carbon removal solution.

By accelerating the Earth’s process of naturally mineralizing rocks to balance atmospheric carbon levels, Eion compresses what would otherwise take thousands of years into a timeline of 1 to 4 years. Eion has optimized olivine—a naturally abundant mineral approved for agricultural use—to weather more quickly while improving soil health at a lower cost to farmers than the material they typically use. Olivine is ideal for ERW because it absorbs a high rate of carbon, and its composition includes various trace elements that enable Eion to measure CO₂ removal.

To meet its ambitious target of removing 10 million tons of carbon dioxide annually starting in 2030, Eion has secured guaranteed access to a minimum of 500,000 tons of olivine per year from Sibelco, a leading mineral solutions provider.

“Abundant mineral supply is critical for enhanced rock weathering to have a meaningful impact on carbon removal,” Chang continued. “Our strategic partnership with Sibelco enables Eion to responsibly scale enhanced rock weathering and lays the groundwork for us to scale in the near future.”

For more information about the news, read the blog post here.

About Eion

Eion is a carbon removal company responsibly scaling enhanced rock weathering (ERW) on agricultural lands. It holds an industry-first patent for directly measuring the carbon removed by mineral weathering in soils using immobile trace elements.

Combining scientific rigor with agricultural know-how, Eion fits into routine farming practices to unlock scale without compromising safety and rigor. That includes using olivine, a naturally abundant mineral that balances soil pH while efficiently absorbing carbon dioxide, and relying on routine soil samples and standard equipment to measure carbon removal and monitor soil conditions.

By working with the agricultural system, Eion is on track to deliver 10 million tons of permanent carbon removal annually starting in 2030 while creating stable jobs in rural communities. Eion is backed by AgFunder and Ridgeline and scientifically vetted by Stripe Climate. For more information, visit EionCarbon.com and follow on LinkedIn.

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