Biomaterial injection is a type of biomass carbon removal and storage (BiCRS) that uses photosynthesis to remove CO₂ from the atmosphere, transforms the resulting biomass (e.g. via pyrolysis or creation of a slurry), and injects it into a geologic reservoir to achieve long-term storage. This pathway is VCL 3-5, meaning that current quantification capacity can establish permanent carbon removal, but that for certain approaches, very significant uncertainties remain.