Photos: Fog or smog? Pollution at dangerous levels in China
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Credit: Getty Images
BEIJING, CHINA - JANUARY 29: Beijing residents wearing masks walk in front of a fog-shrouded National Stadium as severe pollution continues to affect the capital on January 29, 2013 in Beijing, China. China's ruling Communist party has announced temporary emergency measures in an attempt to combat the current hazardous levels of pollution enveloping Beijing. (Photo by Lintao Zhang/Getty Images)
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