CMU researcher studies variation in pollutant emissions

Cities are known to wear an unfortunate toupee of air pollution. Even with EPA standards and the development of green infrastructure, pollutant emissions are much higher in populous cities than in the sprawling countryside. But though much research has been done into how air pollutant levels vary from city to city and from urban to rural areas, efforts have been rare to characterize the intra-city variation in pollution emissions: for instance, how emissions vary between the night lull and rush hour traffic, or how roadway pollutants are different than those emitted from coke factories.

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