BEIJING-JANUARY 29: Tiananmen tower enveloped by the heavy fog and haze in Jan 29, 2013. Many China's cities face serious air pollution and poor air quality as the development of industry.
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BEIJING-JANUARY 29: Tiananmen tower enveloped by the heavy fog and haze in Jan 29, 2013. Many China's cities face serious air pollution and poor air quality as the development of industry.