The Chinese government's response to the smog covering Beijing before the Asia-Pacific Economic Cooperation meeting on Nov 5-11 gives me a sense of d??j?? vu, albeit of a positive kind. Remember the 2008 Olympic Games and the media storm created over the air quality in Beijing before blue skies greeted athletes and officials a day prior to the opening ceremony? No athlete's performance was affected by the city's air quality, as traffic flowed freely.

The Chinese leadership has emphasized the importance of taking measures to deal with the smog during the APEC meeting. Beijing authorities announced a yellow alert for severe smog and air pollution with PM2.5 at more than 500 micrograms per cubic meter. They also have imposed strict vehicle control, encouraged residents to take public transport and declared a six-day holiday to keep the skies clear.

Similar measures were taken during the Beijing Olympics to improve the city's air quality. This was essentially achieved by providing better and cheaper public transport and implementing the odd-even license plate restrictions that allowed car owners to drive only on alternate days. Apart from closing down factories in the Beijing-Tianjin-Hebei region, the authorities introduced cheaper fares and stricter traffic control measures during the Olympics, which helped increase the proportion of Beijing residents using public transport from 35 percent to 45 percent. Standard bus fares were reduced by up to 60 percent for ordinary commuters and 80 percent for students, and the fare for a single subway ride was slashed to 2 yuan ($0.32).