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While we're talking about numbers...great progress in lowering the outdoor air pollution limit for PM2.5 from 12 ug/m3 to 9 ug/m3. Do you know what the legally enforceable limit is for *indoor* particles? Have a listen.
11,138 просмотров • 2 лет назад •via X (Twitter)
Комментарии: 2

Scott Farbman2 лет назад
We’ve been monitoring pm2.5 in our backyard and let me tell you something …

Don Osborn2 лет назад
5000 ug/m3


