Study found highly elevated PM2.5 in pre-COVID-19 subway air in NE US; NYC the worst
Green Car Congress
FEBRUARY 11, 2021
concentrations and particle composition from area samples collected in the subways of Philadelphia, Pennsylvania; Boston, Massachusetts; New York City, New York/New Jersey (NYC/NJ); and Washington, District of Columbia. Philadelphia was comparatively the cleanest system at 39 ?g/m g/m 3 ), followed by the MTA New York at 251 ?g/m
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