Philadelphia’s Air Quality Improving

Philadelphia’s push for clean air started in 1979 after the EPA put the metro region—which at the time included the city, surrounding counties, and nearby locales—into its “severe non-attainment” category. Regulations implementing changes in the 1980s and 1990s are still in force and will likely be enough to get the city back into attainment within three years, Garrow said.

By Leslie Pappas

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