Roadside pollution is measured regularly in Hong Kong, and the deteriorating reading is prompting governmental action. The article makes no mention of reducing vehicle emissions, only reducing the amount of power generation from coal plants by increasing the use of natural gas.
"When roadside pollution is very high, topping 100 on the Air Pollution Index, the government warns people with heart or respiratory illnesses to avoid prolonged stays in heavy traffic areas.
Even if the rest of September has cleaner skies, Hong Kong is poised to record "Very high" pollution for 8.3 percent of the hours in this quarter.
Just over half of the city's electricity is now produced by coal-fired generators. Fifty-two percent of power should be produced by gas by 2015 compared with 39 percent now, according to a policy document to be discussed by the city's Legislative Council."
Note: Watch the video to see how air quality is considered important in attracting different types of 'ex-pats' (expatriots).