gwern comments on Teaching English in Shanghai - Less Wrong

13 Post author: ShanghaiTEFLer 02 November 2012 11:13AM

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Comment author: gwern 03 November 2012 02:53:33PM 3 points [-]

Filters?

Typically only work on particulates past a certain size, which won't deal with many forms of pollution. I've heard of some businesses in Beijing using them but even if one is fortunate enough to work at such a place, that leaves the rest of one's life.

measurably cleaner indoor air

Ah, my old foe: statistical significance. (You can also measure the level of cyanide in your breakfast eggs, doesn't mean you're going to be re-enacting Arsenic and Old Lace anytime soon.)