The nation's air quality is improving but more than half of all Americans are still living in areas with unhealthy levels of air pollution.
The report released by the American Lung Association finds that 166-million Americans live in areas where the air is unhealthy. That puts them at risk for health issues such as lung cancer, asthma, and cardiovascular damage. Both ozone and particle pollution can cause these dangers for the American public.
In the Tennessee Valley the only counties able to be measured are Hamilton County, Tennessee which received an F, Chattooga County, Georgia got a B, and in Alabama, Dekalb County got a C.