Big Tech is investing in carbon removal companies to achieve net-zero climate goals. One surprisingly low-tech solution receiving funding is the startup Lithos Carbon. The company works with farmers across the US to provide leftover rock dust that is spread across crop fields. The dust sucks carbon out of the air—a technology known as enhanced rock weathering. Lithos then measures how much carbon has been captured and sells it in the form of carbon credits.

Frontier, a consortium of investors that include Meta (META) and Alphabet (GOOG, GOOGL), has committed to buying $57.1 million worth of carbon from Lithos by 2028, which will amount to over 154,000 removed tons. Lithos currently sells removed carbon at roughly $370 per ton, but the company plans to use these large investments to scale enough to reach the $100-per-ton price point.

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