Clean air action: applications of citizen science to identify and address air pollution emission sources

The paper aims to improve understanding of how citizen science initiatives reflect or focus on sources of air pollution. It presents reflections emerging from a purposive literature review of 33 case studies. Specifically, it provides insights into how citizen science methodologies address air pollution sources, summarized into a typology that characterizes the pathways used to achieve impacts. The paper also outlines source-specific outcomes achieved in terms of policy, practice, and behavioral change, and recommends future approaches that could strengthen participatory science focused on pollution sources. The paper is based on an analytical framework that catalogs the stakeholders, project goal and implementation plan, source of pollution investigated, participatory citizen science approaches used, and outcome achieved.