By Laurel Morales
http://stream.publicbroadcasting.net/production/mp3/knau/local-knau-849624.mp3
Flagstaff, AZ – Last month on the day the Environmental Protection Agency announced Coconino County to have the cleanest air in the United States, smoke from a prescribed fire caused many problems for people in Flagstaff. This week a lightning caused fire near Williams is causing some smoke in the area. Arizona Public Radio's Laurel Morales talked to a Flagstaff pulmonologist to learn about smoke's effects.