When wildfires burn, the smoke can travel long distances and degrade air quality far away, which presents risks for those breathing it. Fires burning in one state can make air worse several states ...

KN95 and N95 masks are able to a filter up to 95% of particulates that are 0.3 microns or larger from the air, helping to screen the current unhealthy air quality, experts said.

Alleging a fraudulent scheme to drive up costs and damages in dust-mask litigation, 3M Co. obtained court orders, upheld on appeal, to depose a well-known Houston products liability law firm.

Now, during the winter COVID-19 spike, we think it is time for more people to wear masks again in crowded public places, even though there is generally no requirement to do so.