National Science Environment Wildfires In Western U.S. Could Affect Air Quality For Prolonged Period Of Time 5:39pm July 27, 2018 by Kirk Siegler Science Environment National Share URL copied to clipboard! Copyright 2018 NPR. To see more, visit http://www.npr.org/. 300x250 Ad More All Things Considered National Vermont Judge releases Columbia University student Mohsen Mahdawi World News U.S. supports ally Israel at the International Court of Justice by Carrie Kahn 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate