A new report says Indiana is making progress cleaning up its air, but it has a long way to go. The American Lung Associations annual "State of the Air" report gives Posey County a "B" and Vanderburgh and Warrick Counties "Cs" for air quality. While those are better grades than the area has received, the Lung Association says progress on cleaning Hoosier air seems to be stalling. In Kentucky, Henderson County got an "A" while Daviess County got a "C". The report says Pittsburgh has the most polluted air in the country.