I can't stop thinking about it. I went into Google Maps satellite view and looked at the Yangtze River at the location where one of the pictures is. When the resolution of the satellite imagery is good, you can see what's going on. It's anything goes.
You zoom in and massive sections here are bathed in smoke. The left part of this link is low resolution; it's only the high resolution bits that show what's going on.
To give you an idea of scale, here's the center of London at the same zoom.
You zoom in more and it becomes an industrial horror scene.
Huge industrial canals help get the pollution to the main river. There are piles of different-colored resources being managed by huge cranes that run on rails.
There is no part of the river not coated in shipping barges, and you realize...
aw crap, this is where all our shit is being made.