国产精品永久免费视频- 无码精品A∨在线观看中文 -热re99久久精品国产99热-国产成人久久777777

Dalian will release daily monitoring data of PM 2.5 in the latter half of this year, reported Tuesday’s Dalian Daily.

By the end of 2012, 10 environmental monitoring sub-stations in urban areas of Dalian will achieve automatic monitoring of PM 2.5, particulate matter smaller than 2.5 micrometers in size.

Dalian has taken action to improve air quality monitoring system. An automatic monitoring site conducted trial runs of PM 2.5 monitoring last November.