Inside Brazil’s basalt project turning rock into carbon sinks

The article highlights a large-scale carbon removal initiative in Brazil, where a Manhattan-sized basalt field is being used as a live testbed for Enhanced Rock Weathering (ERW). Led by the carbon removal company Terradot in partnership with Microsoft, the project accelerates the natural process by which silicate rocks capture atmospheric CO₂. Finely milled basalt is spread on farmland, where it reacts with rain and soil to form bicarbonate, effectively storing carbon in dissolved form. Brazil’s favorable climate, renewable energy availability, and abundant basalt resources make it an ideal location for this approach. Over the past year, Terradot has applied over 100,000 tonnes of basalt across 4,500 hectares, aiming not only for carbon removal but also to provide agronomic benefits to farmers. Microsoft supports the project beyond funding, contributing technical expertise and backing Terradot’s rigorous measurement and verification efforts. Central to the initiative is the Sentinel research site in São Paulo state, which monitors carbon’s journey from