2018 No https://doi.org/10.1080/09603123.2018.1506570 Kapalo, Peter Europe Experimental Exposure Study Students Temperature Humidity Carbon Dioxide (CO2) Other Educational buildings Indoor environment Carbon dioxide production Physical activity CO₂ concentrations were measured in two university classrooms to assess how student physical activity influenced CO₂ generation. Increased physical exertion raised CO₂ levels, indicating inadequate ventilation and informing IAQ design in educational spaces.