'Unhealthy' Air Pollution Levels

The American Lung Association says 60 percent of Americans live in areas with unhealthy air pollution levels and many of them are in Georgia. Atlanta ranked No. 23 among 25 cities ranked for ozone pollution. Ozone is a reactive gas molecule that's the primary ingredient of smog air pollution and is very harmful to breathe. Fulton, Gwinnett, Cobb and DeKalb were among several Georgia counties that earned an 'F' grade for ozone pollution. But the report does suggest Atlanta has seen improvements in air quality over the last decade.

(Associated Press)

Smog season underway

Smog season starts today. Metro Atlanta ranks 12th smoggiest in the nation according to the American Lung Association. That's up from 25th last year. Most of smog-forming pollution comes from vehicles.