Summary | Beijing issues yellow alert for smog -
China.org.cnUnder China's four-tier warning system, red is the
most severe, followed by orange, yellow and blue.Smog often be
es severe in late autumn and winter.Enditem Print Go to Forum
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China.org.cnMobileNewsletter Beijing issues yellow alert for ...
China.org.cnUnder China's four-tier warning system, red is the
most severe, followed by orange, yellow and blue.Smog often be
es severe in late autumn and winter.Enditem Print Go to Forum
>>0 Comment(s) No ments.your storiesGet more from
China.org.cnMobileNewsletter Beijing issues yellow alert for ...
china.org.cn | 26 October 2017