Summary | In 2013, PM2.5 density became an important indicator
to gauge air quality across China.Since then, the Chinese
government has made a series of ies to reduce air
pollution.Under Chinese air quality standards, an AQI below 100
is defined as a good air quality day.An average daily AQI above
200 indicates heavy air pollution.People including children and ...
to gauge air quality across China.Since then, the Chinese
government has made a series of ies to reduce air
pollution.Under Chinese air quality standards, an AQI below 100
is defined as a good air quality day.An average daily AQI above
200 indicates heavy air pollution.People including children and ...
en.ce.cn | 26 October 2017