Hosted on MSN2mon
As wildfires burn in LA, what to know about protective masksAn N95 mask blocks against 95% of fine particles, while an N90 mask protects the user from 90% of pollutants. When possible, masks should be certified by the National Institute for Occupational ...
Hosted on MSN2mon
As wildfires burn in LA County, what to know about protective masksAn N95 mask blocks against 95% of fine particles, while an N90 mask protects the user from 90% of pollutants. When possible, masks should be certified by the National Institute for Occupational ...
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