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Home » subway

Tag: subway

Is PM2.5 Worse on the Subway?

2017-10-132020-07-15 Thomas Talhelm Leave a comment

I wear a pollution mask in Beijing, and I’ve always taken it off when I get into the subway. That’s because I’ve always assumed air in the subway is better than outside. But am I right to take it off? I’ve heard a lot of Beijingers debating whether air in the subway is any better […]

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