I was recently in Seoul South Korea for a month, and there were a few very bad pollution days. At first I thought there must be a fire close. Then the locals in

I was recently in Seoul South Korea for a month, and there were a few very bad pollution days. At first I thought there must be a fire close. Then the locals informed me it comes from China and their factories. Koreans are obviously not happy about it, and there seemed to be a sense of disdain for China.