By 2008,the indexes of SO2,NOx and CO in the urban air will meet the WHO standards,and the density of particles will reach the level of major cities in developed countries,fully meeting the standard for hosting the Olympic Games.

• 到2008年奥运会举办期间，市区大气中二氧化硫、二氧化氮、臭氧指标达到世界卫生组织指导值的要求，颗粒物浓度达到发达国家大城市水平，满足承办奥运会的需要。