A study published this week in the Proceedings of the National Academy of Sciences found that the particulate matter in the air around many urban areas doesn't just harm the environment—it may also adversely affect the brain once people breathe it in.
While she acknowledged that this was a “discovery study” which wasn't meant to correlate magnetite with increased risk of neurodegenerative disease, Dr. Maher said she is now curious about just that, and wants to examine this possible causal relationship in future studies.
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