Tiny air pollution particles have been revealed in the brain stems of young people and are intimately associated with molecular damage linked to Alzheimer’s and Parkinson’s disease.

If the groundbreaking discovery is confirmed by future research, it would have worldwide implications because 90% of the global population live with unsafe air. Medical experts are cautious about the findings and said that while the nanoparticles are a likely cause of the damage, whether this leads to disease later in life remains to be seen.

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