Air Quality in Philadelphia
Philadelphia has a long history of air pollution. In the early 1900s, the city was known for its smoky skies and noxious fumes. In recent years, however, the city has significantly improved air quality.
There are a number of factors that contribute to air pollution in...
air pollution inphiladelphia
american lung association
bike lanes inphiladelphia
hazardous air quality
philadelphia air quality
smoke and fire from canada wildfires
traffic congestion inphiladelphia