2024 No https://doi.org/10.1021/acs.est.4c02733 Wu, Yangyang Asia Observational Epidemiology Study Modeling Students Elementary (K-5) Middle/Jr High (6-8) High School (9-12) Particulate Matter (PM) Absenteeism Using 12 million health records and satellite-modeled PM2.5, this study analyzed absenteeism at 10,358 schools. A 10 μg/m³ PM2.5 rise was linked to a 4.1% increase in absences, with stronger effects in poorly built schools, highlighting infrastructure gaps.