2024 Yes Indoor Air Quality Prior to and Following School Building Renovation in a Mid-Atlantic School District https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8624555/ Zaeh, Sandra E. North America Exposure Students Temperature Carbon Dioxide (CO2) Carbon Monoxide (CO) School Indoor air quality Renovation In seven urban U.S. schools, pre/post-renovation monitoring showed significant reductions in CO₂, PM2.5, and CO levels after renovations. Results support infrastructure upgrades as a strategy to improve IAQ and protect student health. 2021