Prof. Francis Pope from University of Birmingham delivered a talk on “Low-Cost Source Apportionment (LoCoSA) of Air Pollution” on April 23, 2026. In this talk he presented recent work on Low-Cost Source Apportionment (LoCoSA), an emerging approach that uses networks of low-cost sensors to identify and quantify the sources of air pollution. By combining multiple sensor types with advanced algorithmic and data-driven methods, LoCoSA enabled effective source apportionment in both indoor and outdoor environments. Such approaches can help disentangle contributions from different emission sources, such as traffic, cooking, biomass burning, and industrial activities, thereby improving our understanding of the health burden associated with each source. The talk also highlighted several global case studies, including recent deployments and analyses across Europe and Africa, demonstrating how sensor networks delivered actionable insights at scales not easily achieved with traditional monitoring.