Carbon materials pervade many aspects of modern life, from fuels and building materials to consumer goods and commodity chemicals. Reaching net-zero emissions will require replacing existing fossil-carbon-based systems with circular-carbon economies that transform wastes like CO2 into useful materials. As requested in the Energy Act of 2020, this study will explore regional and national market opportunities as well as infrastructure and research needs to help decisionmakers better understand how carbon utilization can contribute to the nation's decarbonization effort.