Air pollution exposure disparities across US population and income groups
Air pollution contributes to the global burden of disease, with ambient exposure to fine particulate matter of diameters smaller than 2.5μm (PM 2.5 ) being identified as the fifth-ranking risk factor for mortality globally 1 . Racial/ethnic minorities and lower-income groups in the USA are at a higher risk of death from exposure to PM 2.5 than are other population/income groups 2–5 . M