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Diesel Trains May Expose Passengers to Exhaust [research study]

Passenger trains train a rain of exhaust on the passengers, if the trains burn diesel fuel and the passenger cars traipse dutifully behind the exhausting locomotive. Details are in this possibly-not-entirely-surprising study:

Exposure to ultrafine particles and black carbon in diesel-powered commuter trains,” Cheol-Heon Jeong, Alison Traub, Greg J. Evans, Atmospheric Environment, epub February 8, 2017. (Thanks to Falk Fish for bringing this to our attention.) The authors, at the University of Toronto, report:

Ultrafine particle (UFP), black carbon (BC) and lung deposited surface area (LDSA) concentrations measured during 42 trips on diesel-powered commuter trains revealed elevated exposures under some conditions. When the passenger coaches were pulled by a locomotive, the geometric mean concentrations [were] higher than the exposure levels when the locomotive pushed the coaches.”

This drawing is part of the published study:

BONUS: Here are action videos of diesel-powered commuter trains:

Improbable Research