2024 Yes Relationship between indoor and outdoor size-fractionated particulate matter in urban microenvironments: Levels, chemical composition and sources https://www.sciencedirect.com/science/article/abs/pii/S0013935120300955 Martins, Vânia Europe Exposure Modeling Students Carbon Monoxide (CO) Particulate Matter (PM) Home School Indoor/outdoor air Size-segregated particles Chemical elements Children exposure Size-segregated PM samples from Lisbon homes and schools were chemically analyzed to assess children’s exposure. School PM levels were higher, underscoring the need for improved indoor air quality in educational settings. 2020