The only thing you can count on is not that the air will be better in 20 years, but that 40 million more Chinese will be dead, just from breathing it. Honesty is something valueable which chinese bosses and officials are seemingly yet to learn. I hope it comes to them soon, before they are all dead from chasig faster money as they deliver their China Global Toxo~Holocaust.
There IS an over-population problem here... Perhaps this is all part of the ongoing Grand Social Experiment that's been happening in this country for the last few decades.