Enhanced weathering projects are a carbon-removal project type within the engineered & geological segment of the carbon market. They involve acceleration of natural rock weathering to convert atmospheric CO2 into durable dissolved inorganic carbon or mineral forms. In practice, atmospheric CO2 reacts with minerals, producing durable inorganic carbon storage. Common project configurations include Crushed silicate rock spread on cropland; engineered weathering systems.

These projects accelerate natural geochemical processes that already remove CO2 over long timescales, but the speed and location of actual uptake must be evidenced carefully. This segment is generally aimed at more durable carbon storage and is often attractive to buyers seeking high permanence, but lifecycle emissions, measurement precision, and storage durability remain the decisive quality questions. For buyers and program designers, the most important diligence questions are: Are dissolution rates, transport, and net alkalinity robust? Are mining, grinding, and transport emissions fully counted?