Much of the research on the impacts of critical minerals and metals (CMM) tends to focus on the upstream portion of the supply chain—the mines themselves—and explores how impacts at this stage can cascade down through the energy system. Less frequently does research take the reverse view, examining how changes in end-user behavior might percolate upstream to impact CMM production and demand. This project aims to do just that by investigating how a shift towards electrified public transit might impact critical mineral development. The proposed project will assess the environmental, equity, and policy impacts of public transit electrification by conducting social life cycle assessments (SLCAs) for two high-traffic case study cities: Los Angeles, CA and Atlanta, GA. For each city, the team will model alternative scenarios that feature different levels of personal and public electric vehicle adoption to evaluate the energy, environmental, and social impacts inherent in the SLCA framework. In addition to the expected SLCA results, the team plans to produce two particular metrics. The first is what is called an avoided critical mineral extraction index – a measure of how much critical mineral demand is reduced in each scenario associated with increased utilization of electrified public transit. The second is a combined lifecycle emissions metric, which will combine and compare measurements of upstream emissions from mining and battery production with downstream, on-road emissions. SLCA results will be paired with policy analysis to identify legal barriers and opportunities for adoption of electrified and multimodal transportation systems in the two regions to be studied. This proposed scholarship will be rooted in substantial community engagement and partnership activities. The team will work closely with multiple community-based organizations in Atlanta and Los Angeles: EVNOIRE, a non-profit organization focused on electric mobility with offices in both Los Angeles and Atlanta; Clean Cities Georgia, an Atlanta-based non-profit working to advance clean and sustainable transportation solutions; and Integrated Solutions, an Atlanta-based consultancy focused on diversity and inclusion that has expertise in conducting and organizing community engagement processes. In addition to academic journal articles and policy briefs, the team will present their findings to transportation agencies in Los Angeles and Atlanta.