Smog has air purifiers flying off the shelves
By He Wei and Xing Yu | China Daily | Updated: 2011-12-07 07:59
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Two Beijing pedestrians wear masks as they walk on the street on Tuesday to protect them from the heavy smog. Liu Hang / for China Daily |
SHANGHAI / BEIJING - Concern that the thick smog lingering over North China may pose serious health threats has boosted sales of air cleaning products across the nation.
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