Recent results ranging from the Pluto system, the Saturn system, other locations beyond ~5 AU, all the way to Mercury in the inner Solar System, and nearly all points in between, raise questions abut the state of carbon in the Solar System: how do carbonaceous compounds become weathered in response to thermal processes and irradiation? How do we recognize carbon compounds and their various weathering products? The synthesis of these results improves our scientific understanding of the role of carbon in the Solar System, how it evolves and how to recognize it. Analyses of samples from the carbonaceous near-Earth asteroids 162173 Ryugu and 101955 Bennu will provide context for the presence of carbon. In this workshop, please come prepared to discuss observational, laboratory and modeling work related to carbon and carbonaceous species on Solar System bodies.