Beijing is famous for its awesome smog - All you smog fans of the world: Go to Beijing to see smog, so thick you even could cut it...
Here some evidences:


This is the same scene with less smog (after a storm):


But what are the reasons for this?
- Cars that do not use a catalysator
- (Still) a lot of heavy industrie around Beijing
- Sandstorms continously transport dust from the desert Gobi which is about 70 km away