In reply to dissonance:
Yes, something has to change.
When the Olympics went to Beijing and the athletes were complaining about the air quality I thought they were being a bit precious about it all. Having been there a few times now, Bejing, Xiaming, Shenzen and Suzhou I realise what a problem it is. There's no way I would ever live in any of those cities for the sake of my health. Inevitably I develop a cough within a week of staying there.
Of course it's only part of the problem. Vehicle emissions will have to be tackled as well.