Broadly, CDR solutions can be grouped into three categories. There are varying naming conventions for these three groups within the CDR community and a consensus has not yet emerged on how to best label them. For the purposes of this paper, we refer to biogenic, geochemical and novel CDR. Biogenic CDR entails harnessing natural carbon fixation processes through living organisms, such as photosynthesis. Geochemical CDR harnesses carbon fixation processes that occur and are geochemical in nature, such as weathering, mineralization, and the transfer of carbon between the air and ocean. Novel CDR (nCDR) includes novel applications and combinations of chemistry, geochemistry, physics, and biology that do not occur widely in nature, such as most approaches commonly referred to as direct air capture and direct ocean capture.