FACT: China currently burns 2500 tonnes of coal a MINUTE to power its cities...
This air quality problem is YEARS away from getting better and in all reality will probably get much worse..
At least the CX guys can escape it for about half of every month... For all the KA guys - well, your lungs are F#@&*d... Descending through that toxic transition layer 2 or 3 times a day into another city even more polluted than HKG just cant be good for you...