About half of the urban population

About half of the urban population being monitored is exposed to air pollution that is at least 2.5 times higher than the levels WHO recommends.

Results (Chinese) 1:

被监视的城市人口中约有一半被暴露于空气污染，是比水平至少高出 2.5 倍，世卫组织建议。

Results (Chinese) 2:

大约一半的城市人口被监控暴露于空气污染比WHO推荐的水平高至少2.5倍。

Results (Chinese) 3:

被监测的城市人口中，约有一半是空气污染，而空气污染至少比建议的水平高出2.5倍以上。