2024 Yes Assessment of indoor and outdoor air quality in primary schools of Cyprus during the COVID-19 pandemic measures in May-July 2021 https://www.sciencedirect.com/science/article/pii/S2405844022006429 Konstantinou, Corina Europe Opinion Elementary (K-5) Temperature Humidity Carbon Dioxide (CO2) Particulate Matter (PM) Volatile Organic Compounds (VOCs) Indoor air quality School Environmental pollutants Sensors Exposure COVID-19 measures The STEPS study in Cyprus primary schools assessed indoor air quality during COVID-19 protocols, finding high temperatures and PM2.5 exceedances. Ventilation reduced CO2 but increased PM2.5, highlighting the need for balanced air quality and heat stress adaptation. 2022