Pedestrians are silhouetted against hazy sky in Beijing, October 22, 2013. Air quality in Chinese cities is of increasing concern to China's stability-obsessed leadership because it plays into popular... more 
Pedestrians are silhouetted against hazy sky in Beijing, October 22, 2013. Air quality in Chinese cities is of increasing concern to China's stability-obsessed leadership because it plays into popular resentment over political privilege and rising inequality in the world's second-largest economy. REUTERS/Kim Kyung-Hoon (CHINA - Tags: ENVIRONMENT) less 
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Reuters | Photo By KIM KYUNG-HOON / REUTERS
Tue, Oct 22, 2013 5:22 AM EDT