While L.A. still reigns as the most polluted city overall, a new city overtakes it for sootiest.
Pittsburgh surpasses Los Angeles as nation's sootiest city
Pittsburgh surpasses Los Angeles as nation's sootiest city
(via green.yahoo.com)
Submitted by jcs44 on Thu, 2008-05-01 12:34. | Tags: health | American Lung Association | California | EPA | Los Angelos | ozone | particle pollution | Pittsburgh | pollution