A recent U.S. study recommends installing air filters in classrooms to enhance student outcomes while shielding them from harmful pollution. This aligns with growing scientific evidence on air pollution's detrimental effects on cognitive function.
Michael Gilraine, a researcher at Brown University's Annenberg Institute focused on school reform, advocates for air filters in schools based on rigorous analysis. This stems from a real-world event: the 2015 Aliso Canyon gas leak near Los Angeles, which caused health issues like headaches, nausea, and nosebleeds among residents, including many children.
In response, Southern California Gas Company installed air filters in nearby schools to mitigate impacts on students. Though implemented late for that incident, the filters delivered lasting benefits.
Gilraine's research demonstrates that these filters improved indoor air quality, protecting students from everyday pollutants like those from heavy traffic. Results? Math scores rose by 0.20 standard deviations, English by 0.18—gains sustained over two consecutive years. Comparison schools without filters showed no such improvements.
While peer review is pending, this study reinforces prior findings linking pollution to brain health risks.
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