This report quantifies the environmental, health and economic consequences of policy action on air pollution in Arctic Council countries, with a focus on sectoral differences. The report takes a modelling approach and compares a baseline scenario that reflects current legislation, with a policy scenario in which the best available techniques to reduce emissions are deployed in all emitting sectors. The report highlights that benefits from air quality improvements can be obtained when considering emission reductions throughout the economy, and not just in the sectors that are targeted more often, such as industry and transport. The results presented in the report also highlight the need for country-specific policy strategies that take into account the current levels of policy stringency, the sectoral contributions to air pollution, and the need for sectoral investment in new technologies, which also vary by country.