This video is about China, but in Taiwan it was a similar circumstance. The moment I arrived in Taichung, Taiwan, I notice that my vision distance was significantly reduced. Almost everyday that you look up to see the sky, all you would see is a grey smog, clouds don't exist there. Rarely when that was a good wind that is blown through the sky would clear up forming shapes of clouds. You would notice mountain ranges that you couldn't see before because the pollution was limiting your vision. I have never seen dust collect so quickly before, you constantly have to clean everything. When you wash your clothes if you let them hang dry to long they will be dirty from the dust and pollution. Rarely did I feel like washing my clothes made them much cleaner. This is one of the reason they wear the masks to protect themselves from breathing in all the pollution.