Indoor air quality is vital to human health, as people spend most of their time indoors, including at home and in the workplace. While indoor activities such as cooking or cleaning elevate indoor pollution levels, outdoor pollutants simultaneously enter buildings through windows, doors, ventilation, or structural leaks. Conversely, pollutants generated indoors, such as volatile organic compounds or particulate matter, exit through these same pathways, contributing to urban air pollution.


Moreover, the indoor processing of primary pollutants differs significantly from outdoor dynamics (e.g., oxidants and surface interactions). This divergence adds complexity to how pollutants transform during transport and produce secondary pollutants, such as secondary organic aerosols and ozone. Understanding this dynamic is essential for developing effective mitigation strategies and informing policy. It requires integrated insights into emission sources, chemical transformation, indoor-outdoor exchange mechanisms, and the influence of occupant behaviour.


This session invites contributions from laboratory/chamber experiments, indoor and outdoor field observations (including both lived-in and model-house environments), and modelling studies that advance our knowledge of the indoor-outdoor air pollution interface. We particularly encourage submissions addressing indoor emission sources, pollutant transport, transformation, and exposure assessments.