Summary | In the Pearl River Delta region, only 22.2 percent of
days in October had good air quality. The number in September
was 77.6 percent. Ozone remained the top pollutant, ing for 20
days of the 24 polluted days. The number of such cities was
only 19 in September. Six cities in Hebei province ranked in
the top 10 most polluted cities. The city also made the list in ...
days in October had good air quality. The number in September
was 77.6 percent. Ozone remained the top pollutant, ing for 20
days of the 24 polluted days. The number of such cities was
only 19 in September. Six cities in Hebei province ranked in
the top 10 most polluted cities. The city also made the list in ...
en.ce.cn | 08 December 2014