Friedman is an idiot but he's right about this one, China does invest the most in green energy.
And it's not about who is going to have the best air, it's about who is going to supply the world with renewable energy technology, and thanks for the energy lobby and their friends in congress, it might not be the US (which looked like the heavy favorite until pretty damn recently).
Though as always with Friedman, his hysterical rhetoric is not fully justified.
Honestly, this is just really sad though. Especially since I'm sure the government is doing its best to suppress any negative news about this, like that US Embassy Air Quality Index twitter.