A new study conducted by the Medical Research Council’s epidemiology unit at the University of Cambridge reveals that exposure to air pollution significantly increases the risk of developing dementia. The illness currently affects around 57 million people globally, with projections suggesting it will affect at least 150 million by 2050.
The research, which reviewed 51 studies, drew on data from over 29 million participants exposed to air pollutants for at least a year. It found a strong link between three key air pollutants — PM2.5, nitrogen dioxide, and soot — and an increased risk of dementia.
PM2.5, which comes from vehicle emissions, power plants, and wood-burning stoves, was shown to increase the relative risk of dementia by 17%. Similarly, nitrogen dioxide and soot also contributed to the increased risk. These findings highlight the importance of addressing air pollution as a key factor in public health.
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