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Breathing polluted air, whether from city smog or wildfire smoke, is known to harm the lungs and heart. Now, new research sheds light on how these airborne toxins negatively impact the brain, potentially contributing to conditions like Alzheimer’s disease and autism. Scientists have discovered a process by which harmful substances can disrupt the normal function of brain cells, hindering their ability to connect and communicate, ultimately leading to cell damage. Their findings have been published in Proceedings of the National Academy of Sciences.