America's Dirtiest Cities
No. 19 Phoenix/Scottsdale
The desert city moved into the dirty top 20 this year, and also landed at No. 7 on the American Lung Association’s list of the most air-polluted cities. It may even be affecting the local self-esteem: the city also ranked in last place for its sense of civic pride. Voters love this city most during the mild-weathered Christmastime and winter.