The Beihai Park is shrouded in heavy fog in Beijing, January 13, 2013. The capital's air pollution reached dangerous levels again on Sunday, marking the third consecutive day of severe smog. The municipal meteorological station issued the city's first orange fog warning Sunday morning due to decreased visibility caused by the heavy smog. Dense fog on Sunday hit China's east and central regions from the northeast to the south, causing serious air pollution. [Photo: CNS/Zhang Wei]
Buildings are shrouded in heavy fog in Northeast China's Jilin Province, January 13, 2013. Dense fog on Sunday hit China's east and central regions from the northeast to the south, causing serious air pollution. [Photo: CFP]
Buildings are shrouded in heavy fog in Suzhou, Jiangsu Province, January 13, 2013. Dense fog on Sunday hit China's east and central regions from the northeast to the south, causing serious air pollution. [Photo: CNS/Wang Zhongju]
A bridge is shrouded in heavy fog in Guilin, Guangxi Zhuang Autonomous Region, January 13, 2013. Dense fog on Sunday hit China's east and central regions from the northeast to the south, causing serious air pollution. [Photo: CFP]
A man angles from the bank cloaked with fog in Qionghai, Hainan Province, January 13. 2013. Dense fog on Sunday hit China's east and central regions from the northeast to the south, causing serious air pollution. [Photo: CFP]
Editor Kong Yan