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Sandstorm and smog combination causes terrible air quality in Beijing
China Pollution
A police officer in plain clothes, left, rides a bicycle past tourists pose for a group photo on Tiananmen Square on a hazy day in Beijing, China, Thursday, Feb. 28, 2013. Pollution worsened in Chinaâs capital and surrounding regions on Thursday, as the countryâs new leaders geared up for a major congress where experts expect pollution to be on the agenda. (AP Photo/Alexander F. Yuan)
