2024 Yes https://doi.org/10.1016/j.chemosphere.2024.142333 Lin, Tzu-Hsien Asia Experimental Exposure Study Students Staff Elementary (K-5) Temperature Humidity Carbon Dioxide (CO2) Bacteria Other Kindergarten Human-associated bacteria Bioaerosol Size distribution Biodiversity Researchers sampled airborne bacteria in three Taiwanese kindergartens using cascade impactors. Findings linked urbanization to reduced microbial diversity and altered particle sizes, raising concerns about environmental health risks for young children.