Holocene designs and builds chemical plants that efficiently remove carbon dioxide from the atmosphere by making use of a novel organic chemistry developed and tested at ORNL. Two organic compounds are used cyclically in the process – one compound enhances the capacity of water to take up CO2, and the other helps remove the CO2 from the water through the precipitation of a solid that contains the CO2. When the solid is heated, the CO2 is released in concentrated form and can be stored permanently underground.