Thread: pollution masks in cities?
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Old 04-22-15 | 08:46 AM
  #24  
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Originally Posted by erig007
Seems it isn't just a placebo for WHO

WHO | Ambient (outdoor) air quality and health

And since those masks are tested against PM2,5 my estimate guess would be about 30-50% of reduction of air-pollution-related death.
Nothing about masks in that page.
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