2024 Yes Indoor Air Quality Prior to and Following School Building Renovation in a Mid-Atlantic School District https://doi.org/10.3390/ijerph182212149 Zaeh, Sandra E. North America Experimental Exposure Students Elementary (K-5) Middle/Jr High (6-8) High School (9-12) Carbon Dioxide (CO2) Particulate Matter (PM) Carbon Monoxide (CO) Temperature Schools Indoor air quality Renovation In 29 urban public schools, air quality (CO₂, PM₂.₅, CO, temperature) was measured across seasons before and after renovations. Renovated schools had significantly improved CO₂, PM₂.₅, and CO levels. Renovation may benefit students in under-resourced communities. 2021