Here's How Much an N95 Mask Protects You From Wildfire Smoke
by Beth Skwarecki from Lifehacker on (#6C3HM)
I woke up to an air quality alert this morning, as probably a lot of you did. Smoke from Canadian wildfires has drifted toward the eastern half of the U.S., causing poor air quality in many areas. New York City issued a warning for people with heart or breathing problems to mask up when they're outdoors, and many of...