FriendlyFire
Codex WMDicanious
I had one engineering idea for how they could get some of the smog to clear. They could setup large fans in strategically placed locations to create an artifical wind tunnel to push the smog out of the city. It would still be a problem but maybe no so toxic on such a large number of people. I don't know how feasible it is. They would have a huge fans for it to work and powering them would add to the pollution problem.
Dosnt the wind blow thousands of tons of Chinese pollution across the pacific and onto America anyways ?
EDIT: I think more tax cuts and less regulation of coal industry is the solution, wot ?