None ...
Picture hazy skies blanketing Chiang Rai's rice fields right now. PM2.5 levels hover at 35.5 µg/m³, with an AQI of 178, that's unhealthy for sensitive groups ...
California air quality is always changing. People hear "air quality alert" and think it is just another notification, until the air tastes dry, your throat feels scratchy, and the sky looks washed out ...