Subway Dust May be Dangerous
Columbia University researchers have found that the New York City subway produces a large amount of steel dust, composed of iron, manganese and chromium, all of which is breathed in by subway riders in amounts 100 times greater than the levels in other nearby indoor and outdoor settings.
Geochemist Steven Chillrud says, “This study in no way suggests that people should avoid riding the subway. There are no known health effects at the levels that we observed in the NYC subway system. Furthermore, reducing subway ridership would just increase surface traffic emissions.
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