L.A. air still among the nation's worst

Despite improvements over the years, the Los Angeles area remains the most ozone-polluted region in the country, according to a report released Tuesday by the American Lung Association.Susan Abram in the Daily News.

The group's 10th annual national report also found that 38 California counties, including Los Angeles, received a failing grade for air quality - 12 more than last year.

Among other factors, the bad grades reflect a more stringent national ozone standard implemented in 2008, said Bonnie Holmes-Gen, senior policy director for the American Lung Association.