In this article we look at the differences in air quality in the city of Seoul, and whether or not it is actually China's fault for a large portion of their pollution. There is a comparison between other major cities around the world in which displays South Korea as a top 3 major contributor to air pollution behind Beijing and Shanghai. The next most unhealthy air would be Los Angeles which is not nearly as bad. More comparisons made in this article are with New York City in which it is significantly healthier air than Seoul based on these charts. This is an eye opening article as it displays major concern for us moving forward in fighting against air pollution.
The diagram that I have shown at the top is just a little insight on the use of cigarettes and how it effects air pollution by itself.