Whenever Philadelphia winds up on a best or worst list, it's like catnip for the local media.
Travel + Leisure magazine is a year-round treasure trove for these lists, and this month a Web-only article reports that Philadelphia ranked No. 2 on its list of "America's Dirtiest Cities."
Number one? New Orleans. Remember how Ray Nagin, who was then New Orleans' mayor, declared in 2007 that Philadelphia was dirtier than his hurricane-ravaged city?