FAIRBANKS - A temperature inversion has pushed pollution to unhealthy levels that triggered an air quality alert in Fairbanks.
The Fairbanks Daily News-Miner reported the levels of tiny but harmful airborne particles prompted officials to ask Fairbanks North Star Borough residents to avoid exercise and stop burning wood and coal when possible.
The air quality began deteriorating early this week. On Tuesday, the borough issued an advisory judging the air unhealthy for sensitive groups - young children, the elderly and people with heart and lung disease.
The pollution grew worse Wednesday, with the air quality index at stage four. Stage one is good air and stage six is air quality considered hazardous.
The National Weather Service said the temperature inversion was expected to weaken soon.