成都上月仅有1天空气质量达标 其余30天均评为污染 (Air quality in Chengdu met minimum standard only one day in December 2013)
Sichuan Daily, January 28, 2014
politics.scdaily.cn/szyw/content/2014-01/28/content_6840711.htm?node=3605
成都上月仅有1天空气质量达标 其余30天均评为污染 (Air quality in Chengdu met minimum standard only one day in December 2013)
Sichuan Daily, January 28, 2014
politics.scdaily.cn/szyw/content/2014-01/28/content_6840711.htm?node=3605
