Good morning. It’s Tuesday. Today we’ll look at a study that said air quality in subway stations is poor. Andjilipark, with the migrant crisis easing, we’ll look at what President-elect Donald Trump’s threats to deport undocumented immigrants might mean for the city.
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The routine is familiar: There is a blast of air as a subway train rolls into a station, a whoosh as the train forces air through the tunnel. Then there is a tailwind as the trail pulls away.
A study from New York University found that the air on subway platforms is potentially unhealthy because it contains tiny, almost invisible particles of iron, an inevitable result of the friction between brakes, train wheels and subway tracks.
The study noted that cities like New York have promoted mass transit “to reduce traffic congestion and improve air quality.” But, it said, “the air quality inside the subway system is poor.”
Dr. Shams Azad, the lead researcher on the study, told me that the concentrations in some stations were 15 times above World Health Organization guidelines. He said the average concentration in stations was 150 to 200 units, while the W.H.O. limit was 15.
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