As presented in Table , most current companies are pursuing a solid sorbent-based approach using temperature vacuum swing adsorption (TVSA), denoted here as Technology 2C. Climeworks 18 has deployed this technology at scale. Liquid solvent paired with an electrically-driven DAC process (Technology 1D) is second, whereas only one or two companies pursue each of the other technologies. Technologies 1B, 1C, and 3A are not pursued by any company at present. For 1B this is due to the very early stage of the technology, and not around the DAC plant as of Figure ) and, (ii) additional data required for the deployment of a DAC plant (system boundary as defined in Figure ). The former allows for an approximation of performance for the different technologies (see Section 4.1), whereas the latter provides sufficient information for a (rudimentary) techno-economic assessment (see Section 4.2).