NOVELTY - The carbon sequestration method comprises providing biomass to a pyrolyzing system, which generates biochar and filtrate carbon, collecting the biochar and the filtrate carbon, subjecting the biochar and filtrate carbon to a neutral atmosphere at or above temperatures of 250 degrees C for a predetermined time interval to form inert carbon, utilizing the biochar as a capture element for the filtrate carbon to form dense carbon aggregates, utilizing the inert carbon as anthracite coal, and compressing the carbon aggregates into pellets with a peak pressure of 10000 psi.    USE - The carbon sequestration method is useful for converting biomass such as wood, grasses, leaves, compost, food crop residues, wildfire abatement trimmings and biomass from land use conversion into highly inert carbon for long-term storage, and in solar, wind and nuclear power stations for stationary power applications and to charge batteries to power mobile transport applications.    ADVANTAGE - The carbon sequestration method reduces or balances the atmospheric concentration of carbon dioxide against increased fossil fuel carbon emissions, and easily produces highly inert carbon via various pyrolysis products of biomass without massive amounts of another mineral or compound to facilitate storage.    DETAILED DESCRIPTION - The carbon sequestration method comprises providing biomass to a pyrolyzing system, which generates biochar and filtrate carbon, collecting the biochar and the filtrate carbon, subjecting the biochar and filtrate carbon to a neutral atmosphere at or above temperatures of 250 degrees C for a predetermined time interval to form inert carbon, utilizing the biochar as a capture element for the filtrate carbon to form dense carbon aggregates, utilizing the inert carbon as anthracite coal, and compressing the carbon aggregates into pellets with a peak pressure of 10000 psi. The carbon aggregates are compressed with a water-based starch binder having a starch concentration of 4%. The method further comprises drying and crosslinking the starch binder in open air at 300 degrees C for 15 minutes at an inert atmosphere of carbon dioxide, nitrogen and water vapor, spraying a hot starch solution with a starch concentration of 7% on to all surfaces of the pellet at the end of the drying. The pellets that result are 1 inch in diameter and one half to 1 inch thick. The carbon dioxide and nitrogen comprises 70% or more vapor pressure. A secondary coat is applied to each pellet by spraying a hot molten pine rosin on to all surfaces of the pellet at the end of a starch drying cycle such that a coating of 0.02-0.08 mils thick results. A weather-protected unit is arranged for transporting the pellets to a long-term underground storage location such as a reclaimed surface mine. The long-term underground storage location comprises an underground storage facility in which the pellets are stored in layers of 10-50 feet deep. The pellets are tightly compacted with an overburden material. The top layer material scraped away to create long-term underground storage location is used as the overburden material. The overburden material has same thickness as the underground storage facility's storage seam depth. The underground storage facility has a storage packing structure in which the pellets are stored. An inert fill material is placed between the pellets to minimize the potential propagation of underground coal seam fires. The underground storage facility has a storage packing structure in which the pellets are stored. The group of the pellets is compartmentalized with sections of inert fill material to minimize the potential propagation of underground coal seam fires. The pellets stored by the underground storage facility have controlled structural degradation based on water exposure thus allowing the pellets to be seamlessly compacted into the underground storage facility. The pellets are designed based on controlled degradation of the starch binder used in dry storage environments, shallow strata, or with a large amount of mix-in with the overburden material surrounding the pellets. The pellets are coated with a durable water repellant rosin thus allowing construction of storage arrays in a wet environment, a water submerged environment, or in an environment that is subject to expected water exposure prior to replacement by the underground storage facility. An INDEPENDENT CLAIM is included for a system for carbon sequestration.