Transportation Nation

Explainer: Perfluorocarbons, the Gas Released In NYC's Subway Airflow Test

Thursday, July 11, 2013


When researchers released a tracer gas containing a chemical called perfluorocarbon into New York's subway on Tuesday, it didn't take long for people to wonder if that so-called nontoxic gas might not be all that harmless. Short answer: it's safe.

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