"The Asian Development Bank and Tsinghua University recently released the ''National Environmental Analysis'', which reported that among the world's ten most air polluted cities, 7 are in China: Taiyuan, Beijing, Urumqi, Lanzhou, Chongqing, Jinan and Shijiazhuang. The report also points out that only 1% of China's 500 cities have met the air quality standard recommended by the World Health Organisation." (Quoted from article)