Brisbane's smog - becoming too much?

I was out and about Brisbane last night and captured this image - which disturbed me.
In the early 1990's I moved to Brisbane partly because it was a cleaner greener city than Melbourne where I had been living.   My asthma immediately improved and I felt better physically.

This image captures Brisbane's smog layer and a concentration of smog over Mount Cootha (in the background).  It raises questions for me about whether Brisbane is still a healthy place to live...

This image was captured using the Canon G1X, handheld.  ISO 400, f7.1, 0.8 sec, -2/3 EV