2024 No Submicron particle-bound polycyclic aromatic hydrocarbons in the Polish teaching rooms: Concentrations, origin and health hazard https://www.sciencedirect.com/science/article/abs/pii/S100107421730966X?via%3Dihub Rogula-Kozlowska, Wioletta Europe Exposure Particulate Matter (PM) Indoor air Submicrometer particles Health hazard Polycyclic aromatic hydrocarbons (PAHS) Benzo(a)pyrene PM1-bound PAHs were measured in university classrooms and outdoors in two Polish cities. Indoor and outdoor levels were comparable, with some indoor sources suspected. Despite elevated PAH levels, overall health risks from the PAH mixtures were low. 2017