In Pictures: Heavy smog descends on China's northeast
A man pushes a bike onto a bridge during a day of heavy pollution in Harbin in northeast China's Heilongjiang province Monday Oct. 21, 2013. Visibility shrank to less than half a football field and small-particle pollution soared to a record 40 times higher than an international safety standard in the northern Chinese city as the region entered its high-smog season.The Associated Press
Two women cover up their mouths and noses with a jacket as they cross a street covered by dense smog in Harbin, northern China, Monday, Oct. 21, 2013.The Associated Press
A traffic policeman signals to drivers during a smoggy day in Harbin, Heilongjiang province, October 21, 2013.CHINA DAILY/Reuters
People walk through a square during a smoggy day in Jilin, Jilin province, October 21, 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.CHINA STRINGER NETWORK/Reuters
A combination picture shows the 75-storey high landmark skyscraper of Shenyang in Liaoning province taken on October 11, 2013 (bottom) and October 21, 2013.SHENG LI/Reuters
A statue of China's late Chairman Mao Zedong is seen on a smoggy day in Shenyang, Liaoning province, October 21, 2013.SHENG LI/Reuters
A woman wearing a mask checks her mobile phone during a smoggy day on the square in front of Harbin's landmark San Sophia church, in Heilongjiang province October 21, 2013.CHINA STRINGER NETWORK/Reuters
People ride along a street on a smoggy day in Daqing, Heilongjiang province, October 21, 2013.CHINA STRINGER NETWORK/Reuters
People walk on a bridge during a smoggy day in Jilin, Jilin province, October 21, 2013.CHINA STRINGER NETWORK/Reuters