Gaps in US wildfire smoke warning network leave many exposed
In this Aug. 11, 2021 file photo smoke from a wildfire obscures a stand of trees on the Northern Cheyenne Indian Reservation, near Ashland, Mont. In southeastern Montana, communities in and around the Northern Cheyenne Indian Reservation were ordered to evacuate as the Richard Spring Fire grew amid erratic winds. (AP Photo/Matthew Brown,File)
By MATTHEW BROWN and PADMANANDA RAMA
Associated Press
BILLINGS, Mont. — Huge gaps between air quality sensors in the western U...
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