2024 No Investigation of the PM2.5, NO2 and O3 I/O ratios for office and school microenvironments https://www.sciencedirect.com/science/article/abs/pii/S0013935119305882?via%3Dihub Kalimeri, Krysallia, K. Europe Observational Exposure Elementary (K-5) Ozone (O3) Nitrogen Dioxide (NO2) Fine particles Nitrogen dioxide (NO2) Ozone (O3) Offices School Using EU project data, I/O ratios of PM2.5, NO₂, and O₃ were compared in schools and offices. Schools showed lognormal pollutant distributions and higher indoor impacts, highlighting the need to account for setting-specific exposure dynamics. 2019