Fog-enveloped city Changsha
Vehicles run on fog-enveloped road in Changsha, capital of central China's Hunan Province, Jan. 20, 2013. (Xinhua/Long Hongtao)
Vehicles run on fog-enveloped road in Changsha, capital of central China's Hunan Province, Jan. 20, 2013. (Xinhua/Long Hongtao)