2024 Yes Evernia Goes to School: Bioaccumulation of Heavy Metals and Photosynthetic Performance in Lichen Transplants Exposed Indoors and Outdoors in Public and Private Environments https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6571755/ Paoli, Luca Europe Observational Modeling Elementary (K-5) Middle/Jr High (6-8) High School (9-12) Heavy metals Biomonitoring Chlorophyll fluorescence Citizen science Evernia prunastri Exposed to control ration indoor pollution Lichens were used to biomonitor IAQ in Slovak schools and homes. Indoor Cd, Cu, and Pb levels were detected, with indoor Cd likely originating from internal sources. Results support lichens as viable IAQ monitors in educational settings. 2019