N95s offered the best protection against wildfire smoke, reducing exposure to harmful particles by a factor of 16, according to the study published in August in the journal GeoHealth.
They’re on beaches, in parking lots and on sidewalks. You probably won’t catch the coronavirus from a discarded mask, but the litter poses a risk to the environment.
Temperature checks, desk shields and no public transit: The guidelines would remake office life. Some may decide it’s easier to keep employees at home.
