Philly Has an Air Pollution Problem. These Researchers Think Its Neighborhoods May Hold a Solution presented by: VILLANOVA UNIVERSITY COLLEGE OF LIBERAL ARTS AND SCIENCES PRINT Philadelphia ranks as one of the nation’s 25 worst metro areas for ozone and year-round particle pollution, according to the American Lung Association , but it’s not exactly easy to stop those health hazards from accumulating in our city. “These two pollutants are what is also known as secondary pollutants,” says Kabindra Shakya, PhD, an assistant professor of geography and the environment at Villanova University. “They’re not directly emitted from emissions sources such as tailpipes but formed in the atmosphere. They have multiple formation pathways, and particles also have primary sources..” The city’s individual neighborhoods, however, can vary widely when it comes to air quality. Their different make-ups may shine a light on how to mitigate the problem, according to...