I will throw my 2 cents here. The air pollution is really bad, there is no way around it. I never used to consider air quality in the states when I went out jogging or walking. Now in HKG if I can't see across the harbor (couple of miles) I skip the outdoors activities. It is not HKG's fault, the air comes from mainland China where there is no air quality standards. There are many great things in HKG, but not the air.