A flock of wild pigeons fly over the Potala Palace in Lhasa, capital of southwest China's Tibet Autonomous Region, on Jan. 10, 2008. Lhasa, which is entitled the City of the Sun, has met the target of more than 345 days, or more than 95 percent of a year, with fairly good air quality every year since 2000. (Xinhua Photo)
The Potala Palace is seen under the blue sky in Lhasa, capital of southwest China's Tibet Autonomous Region, on Jan. 10, 2008. Lhasa, which is entitled "the City of the Sun", has met the target of more than 345 days, or more than 95 percent of a year, with fairly good air quality every year since 2000. (Xinhua Photo)
