Of course, you may say. 
Especially when you are living in Hong Kong where sometimes you can see the air you are breathing in.
But I am not talking about the air quality here. 
It’s bad, everyone knows, period.
I remember the moment I touched the Hong Kong soil, I had mixed feelings in my stomach. 
Now I know why–there is something in the air.
This thing caused confusion, anxiety, excitments, adventurous sparks.
Now it’s doing the same thing to me again. 
It’s almost a cross-road.  And there is no right direction.
Time to trust my gut, again. 
Good luck!