Here is another picture of the view from my appartment window in Fengtai, Beijing when the polution reading is 264 out of 500 (Very unhealthy). In comparison I have also included the earlier picture from last month when the reading was 6 out of 500 (Time to do some deep breathing). 

264 out of 500

6 out of 500

We could say that there is a fair amount of difference... I didn't do any photoshopping, these are just straight from my phone. Luckily the foggy days are getting lesser than how it was in the middle of summer. But the weather changes every day and can change as radically as this on the same day. Looking out the window every morning is pretty adventurous!:)