By Charles Riley @CRrileyCNN December 10, 2013: 3:59 AM ET
Competitive disadvantage?
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People walk along The Bund, a major tourist attraction in Shanghai.
Until this wave of pollution hit, there was a perception that Shanghai was better equipped to handle dirty air than Beijing.
The ramifications could be major -- and even effect the development of the Shanghai Free Trade Zone, an experimental commerce area that is seeking to attract foreign firms.