The air pollution in Mongolia’s capital city, Ulaanbaatar reached hazardous levels on Sunday when the air quality index (AQI) exceeded 600 PM2.5 particles per cubic metre.
The World Health Organisation considers an AQI of more than 50 to be moderately unhealthy, while anything up to 500 is considered ‘hazardous’. The AQI does not measure any levels above 500. Air pollution in China’s major cities, such as Beijing, frequently exceeds 200, during which time government alerts warn citizens not to go outside without a mask. Breathing air with extremely high levels of PM2.5 particles has been linked to lung cancer and heart disease. Read more: ubpost.mongolnews.mn