The China Meteorological Administration recently issued its "China Climate Bulletin 2014." According to its report, the smog situation has worsened in China. Last year, there were 61 Smog days in the area of Beijing, Tianjin, and Hebei Province, a 70 percent increase over the 36 days in the previous year. On average, the whole nation has 17.9 smog days.
Source: Caixin Online, January 12, 2015