To blame were forest fires in the hills surrounding the valley. Readings by the Chiang Mai Air Quality Health Index (CMAQHI) showed air quality index (AQI) scores in Samoeng's tambon Yang Moen had exceeded 500, the highest level the AQI can record.
To blame were forest fires in the hills surrounding the valley. Measurements from the Chiang Mai Air Quality Health Index (CMAQHI) indicated air quality index (AQI) scores in Samoeng's tambon Yang Moen had surpassed 500, the highest level AQI can record.