2022 Yes https://doi.org/10.3390/ijerph19084820 Mock, Kelton North America Observational Epidemiology Study Exposure Study Students Elementary (K-5) Middle/Jr High (6-8) High School (9-12) Absenteeism Respiratory symptoms Other Asthma prevalence Obesity Children Pediatrics Industrial zone Industry Zoning Latinx Latino Hispanic Cross-sectional analysis of 39,974 K–12 students in Santa Ana, CA linked industrial zone proximity with asthma prevalence and obesity risk. Findings highlight zoning’s role in pediatric health disparities.