Is a combination of haze, fog and haze. The haze is common in the city. In many areas will be incorporated into the China fog haze as disastrous weather forecast, referred to as “haze weather”.

The haze is the specific climatic conditions and human activity is the result of the interaction. The economic and social activities of high population density will emit a large amount of fine particulate matter (PM2.5), once the emissions exceed the capacity of the atmosphere circulation and carrying capacity, the concentration of fine particles will continue to accumulate, if by static stability weather effects, prone to a wide range of haze.

In 2013, the haze has become keywords. In January of this year, 4 times over the haze process in 30 provinces (autonomous regions and municipalities), in Beijing, only 5 days instead of haze days. The report shows, the 500 largest city Chinese, less than 1% of the city to achieve air quality standards, recommended by the WHO at the same time, 7 Chinese in 10 the world’s most polluted city.

In January 4, 2014, the national disaster reduction office, the Ministry of civil affairs for the first time the health hazards of fog and haze included 2013 natural disaster briefing.

In December 2016, Chinese winter to the most persistent haze weather is coming, Beijing city has reached a number of serious pollution, the haze invasion including Beijing and Tianjin, Shanxi, Shaanxi, Henan and other 11 provinces, regions, the current large-scale haze is still ongoing, for Beijing, most of the time in 2016, as long as there is no the wind, fog and haze has become the norm.

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