Beijing Logs Last Blue Sky Day of 2007

On the last day of the year, Beijing registered 246 "Blue Sky Days," meeting China's goal to tackle air pollution before the Olympic Games. In order to log a "Blue Sky Day" 27 monitoring stations across the city must show levels of three air pollutants have been reduced in order to cut smog that perpetually lingers over the city. According to James Reynolds of the BBC, on a typical day when pollutants have not been reduced, it is difficult to see more than 50 metres into the distance.

Due to respiratory issues caused by choking smog that could impact athletes, Olympic officials have warned some games may be cancelled if air pollution is not cleaned up. Reportedly China's government is not as stringent with its air quality index as other countries. A good day in Beijing would be considered a polluted day in the U.S., with increased levels of sulfur dioxide, particulate matter and NOx.

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