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Researchers make worrisome discovery while analyzing Philadelphia subway — here's what they found
The Conversation reported on a recent study that revealed air quality in Philadelphia's SEPTA subway system is far worse than the air on the city streets just above them. Researchers from ...
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Air pollution inside Philadelphia's subway is much worse than on the streets, study finds
The air quality in the City Hall subway station in downtown Philadelphia is much worse than ... black carbon is being generated by the subway system itself. Graphite used on brake pads is one ...