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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.

Joseph Allen

48,826 subscribers

11,138 次观看 • 2 年前 •via X (Twitter)

健康养生科学技术教育

Anya Rossi• Live Now

Private livecam show

2 条评论

Scott Farbman 的头像

Scott Farbman2 年前

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

Don Osborn 的头像

Don Osborn2 年前

5000 ug/m3

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