Biomass geological storage projects are a carbon-removal project type within the engineered & geological segment of the carbon market. They involve processed biomass stored in suitable subsurface or geologic formations for long-term sequestration. In practice, atmospheric carbon fixed by biomass is isolated in a durable geologic storage environment. Common project configurations include Injection of processed biomass into geological formations or engineered subsurface storage features.

These pathways aim to isolate biomass-derived carbon from decomposition for very long periods, which makes storage conditions central. 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: Is biomass sourcing sustainable? Does the storage environment prevent decomposition? Are monitoring and leakage controls sufficient?