2020 No https://dx.doi.org/10.1021/acs.est.0c02792 Laguerre, Aurélie North America Experimental Exposure Study Students Staff Middle/Jr High (6-8) Carbon Monoxide (CO) Particulate Matter (PM) Volatile Organic Compounds (VOCs) Ozone (O3) Nitrogen Dioxide (NO2) Pre/post renovation study measured how advanced air cleaning reduced indoor traffic-related pollution in a school near a freeway; findings highlight air quality improvements that support student health and equity.