2024 No Trace element contents in fine particulate matter (PM2.5) in urban school microenvironments near a contaminated beach with mine tailings, Chañaral, Chile https://pubmed.ncbi.nlm.nih.gov/28536962/ Monsalve, Stephanie South America Observational Exposure Elementary (K-5) Particulate Matter (PM) Trace elements Particulate matter (PM) School Mine tailings Heavy metals PM2.5 samples from six Chilean schools revealed higher indoor trace element levels, including toxic metals like Cu, Zn, Ni, and Cr. Likely sources were mine tailings and marine aerosols, underscoring the need for policy action to protect children’s health. 2017