Microsoft announced an agreement to remove 12,000 tons of CO2 from the  atmosphere between 2026 and 2029 through enhanced rock weather (ERW). 

Microsoft signed the agreement with Terradot, a company involved in ERW technology, for projects in Brazil that will deliver their first carbon removal credits in late 2025.

With Microsoft’s offtake, Terradot has already begun implementing this research protocol in Brazil, where the company is expanding its commercial operations. The deal will provide funding for Terradot to conduct the most comprehensive scientific monitoring ever implemented at a commercial ERW site.  

This deal follows Terradot’s $54 million Series A funding round, with participation from Microsoft’s Climate Innovation Fund, and the nearly 300,000 tons of carbon removal agreements secured in late 2024 with Google and Frontier.

“This deal advances Microsoft’s interest in exploring under what conditions Enhanced Rock Weathering can safely become a cost-effective, scalable source of high-quality carbon removal,” said Brian Marrs, senior director, energy and carbon removal at Microsoft, in a statement. “Improving soils – both through conservation practices and addition of alkaline rocks – has the potential to deliver real benefits to farmers in addition to the climate.”

With over 300,000 tons in carbon removal deals secured to date, Terradot is quickly expanding its commercial operations in Brazil. To date, the company has spread nearly 50,000 tons of rock across 2,000 hectares of land.

The rock used is mined at quarries that are located within 50 kilometers of the project sites. This close proximity of rock quarries to farmland across Brazil reduces the complexity and cost of project development and deployment. Additionally, Brazil’s tropical soils and wet, warm climate, which speed up the weathering process, make it one of the most ideal places in the world to scale ERW.