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The report analyzes four decarbonization pathways for California's cement sector, all incorporating carbon capture and storage (CCS) to address process emissions. Pathways involving limestone calcined clay cement (LC3) and alternative fuels (woody biomass or engineered municipal solid waste) demonstrate the lowest lifetime carbon abatement costs, around $100 per metric ton of CO2. In contrast, full electrification combined with CCS is the most expensive at $479 per metric ton. While all pathways significantly reduce emissions relative to a baseline, the report highlights that energy costs are the primary driver of lifetime expenses. Qualitatively, the transition to these technologies is expected to provide net air quality benefits by reducing SO2 and particulate matter, although amine-based CCS may slightly increase VOC emissions.