Environment
Air quality suffers due to smog
China.org.cn, October 31, 2011
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![Photo taken on Oct. 22, 2011 shows Beijing is enveloped by heavy fog. Heavy fog shrouds several northern and eastern Chinese regions Sunday. [Xinhua]](../../attachement/jpg/site1007/20111031/001fd04cf03a101846a626.jpg "Photo taken on Oct. 22, 2011 shows Beijing is enveloped by heavy fog. Heavy fog shrouds several northern and eastern Chinese regions Sunday. [Xinhua]")
Photo taken on Oct. 22, 2011 shows Beijing is enveloped by heavy fog. Heavy fog shrouds several northern and eastern Chinese regions Sunday. [Xinhua]
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