Studies show that most colleges and universities have inadequate indoor air quality (IAQ), which can result in increased health issues and lower student performance. Symptoms like headache, dizziness, and tiredness have been found to be higher in classrooms with higher concentrations of carbon dioxide, as well as increased difficulty concentrating. Other studies have found students had less attention and vigilance in classrooms with low IAQ, and even more negative impact on higher-order complex tasks. 

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