VIENTIANE (Vientiane Times/ANN): Several areas across Laos recorded PM2.5 concentrations exceeding safety limits, posing health risks to sensitive groups, according to a report issued by the Natural Resource and Environment Research Institute.
The highest PM2.5 level was measured at 81.9 micrograms per cubic metre in Bountay district, Phongsaly province with an Air Quality Index (AQI) of 140, classified as unhealthy for sensitive groups.
