A man wearing a face mask rides a bicycle on a bridge in front of the financial district of Pudong covered in smog during a polluted day in Shanghai, China. Photo: Reuters Face masks available to consumers in China for protection against air... A man wearing a face mask rides a bicycle on a bridge in front of the financial district of Pudong covered in smog during a polluted day in Shanghai, China. Photo: Reuters Face masks available to consumers in China for protection against air...
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