• New York City subway riders are concerned about hazardous air quality, especially on hot days.
• A report by the Riders Alliance advocacy group found that some underground stations can have air pollution levels exceeding federal safety standards.
• The report blames the lack of ventilation in some stations, especially those not equipped with air conditioning.
• The Riders Alliance is calling on the MTA (Metropolitan Transportation Authority) to improve ventilation and air quality standards in the subway system.

Read more at The Guardian.