2024 No The effect of increased classroom ventilation rate indicated by reduced CO2 concentration on the performance of schoolwork by children https://doi.org/10.1111/ina.12210 Peterson, S. Europe Experimental Students Elementary (K-5) Carbon Dioxide (CO2) Ventilation rates Test performance Cognitive Function Indoor environment Ventilation carbon dioxide Schools children Performance Double-blind crossover study in Danish schools measured how increased ventilation (lower CO₂) affects test performance in 10-12 y.o. students. Higher air supply improved all four academic tests. Supports policies enhancing classroom air quality to boost learning outcomes. 2016