Expat, you need to jsut focus on yourself. Noble thing to do to call everyones attention to pollution if you truly think it is a health risk. But at the end of the day it is human nature for everyone to focus on themself. You are correct in that some people may turn a blind eye for the sake of profits and the HK govt is not necessarily innocent if pollution is a risk. But why waste energy. Personally I learned and it is not easy to do so to not give a rats azz about other people once you got what you need. Thats how most of HK operates anyway be it local or expat.
If you keep posting the "board Triad", is sure to break your legs and then drag you out into the alley.