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(NEW YORK) -- Heavy blankets of smoke billowing over the U.S. from the wildfires burning in Canada are threatening the health of millions of people -- even non-vulnerable populations with no preexisting conditions. But what about the smoke makes it so hazardous for humans to be around? Wildfire smoke contains fine particulate matter, known as PM2.5,
ABC News(NEW YORK) -- Heavy blankets of smoke billowing over the U.S. from the wildfires burning in Canada are threatening the health of millions of people --
ABC News(NEW YORK) -- Heavy blankets of smoke billowing over the U.S. from the wildfires burning in Canada are threatening the health of millions of people -- even non-vulnerable populations with no preexisting conditions. But what about the smoke makes it so hazardous for humans to be around? Wildfire smoke contains fine particulate matter, known as PM2.5, which are microscopic solid or liquid droplets -- often 30 times smaller than the diameter of a human hair -- that can be inhaled and cause serious health problems, according to the U.S. Environmental Protection Agency. Most particles form...
A Code Red alert for unhealthy air in the District began Wednesday morning and forecasts predict it will continue through Thursday.
(Updated at 10:30 a.m.) It’s another day of poor air quality for Fairfax County and the rest of the D.C. area. As wildfires continue to burn in Canada, the resulting smoke has clouded the East Coast in a sometimes orange-tinted haze of particulate matter. As of 9 a.m., Fairfax was at 313 on the Air