Long-term storage of CO2
By injecting captured carbon dioxide into deep subsurface rock formations – such as depleted oil and gas reservoirs, saline formations, or deep un-minable coal beds – long-term storage can be safely achieved.
Underground injection of CO2 for purposes such as Enhanced Oil Recovery (EOR) and Enhanced Gas Recovery (EGR) are known practices. CO2 injection specifically for geological sequestration involves different technical issues and potentially much larger volumes of CO2, and large-scale projects.