Summary | The World Health Organization's re mended maximum is
25 micrograms per cubic meter.Coal burning and car emissions
are some of the major sources of air pollution.And this year's
Guangzhou Auto Show highlights new energy vehicles, smart cars
and SUVs.| People's Daily Online | China.org.cn| CNTV | China.|
Global Times | Ecns.cn | China Youth International | Visit ...
en.ce.cn | 18 December 2015