A new study led by researchers at Barrow Neurological Institute has found that people living in regions with median levels of air pollution have a 56 percent greater risk of developing Parkinson’s disease compared to those living in regions with the lowest level of air pollution. The study, which will be published online on Monday, Oct. 30 in Neurology - the medical journal of the American Academy of Neurology - was conducted to identify national, geographic patterns of Parkinson’s disease and test for nationwide and region-specific associations with fine particulate matter.