Rock Flour Co. is developing a scalable, nature-based solution for net-negative agriculture. Its product, glacial rock flour (GRF), is an ultra-fine, unweathered silicate mineral from Greenland that enhances soil productivity while permanently sequestering CO₂ through enhanced weathering. The company holds exclusive rights to three billion tonnes of GRF, is piloting in Denmark, and targets a 200-million-hectare global market.