WHO vs. South Korea Guidelines for Air Quality

Today, two South Korean cities once again ranked in the world’s top ten for bad air quality. Seoul, the country’s capital and most populous city, was one of the two. The air pollution ranking around 2 p.m. KST. Air Quality Index (AQI) 101-150 is unhealthy for sensitive groups; 151-200 is unhealthy; AQI levels beyond 200 are classified as very unhealthy or hazardous. (Source: AirVisual)Joongang Ilbo, a daily newspaper, recentlyanalyzed [http://news.joins.com/article/21411338]the PM 2.5 level in