By Hugo Francisco de Souza Reviewed by Susha Cheriyedath, M.Sc. Sep 10 2025 A first-of-its-kind study reveals that classroom air carries more microplastics than outdoor air, raising urgent questions about children’s daily exposure to hidden pollutants. Study: Airborne microplastics and plastic additives in a school environment: identification, quantification, and associated inhalation risks . Image Credit: Drazen Zigic / Shutterstock Factory winds carried PVC inside: Polyvinyl chloride only