Sihai network

Why is there haze? How is haze formed

Haze is a combination of fog and haze. Because of the deterioration of air quality, haze weather phenomenon appears to increase, the harm is aggravated. In many areas of China, haze weather is incorporated into fog as early warning and forecast of disastrous weather. Collectively referred to as' haze weather '.

Sulfur dioxide, nitrogen oxides and inhalable particles are the main components of haze, the former two are gaseous pollutants, and the last one is the culprit of aggravating haze weather pollution. They combine with the fog and make the sky gray for an instant. The abbreviation of particulate matter is PM. Beijing monitors PM10, that is, pollutant particles less than 10 microns in diameter. The particle itself is not only a pollutant, but also a carrier of toxic substances such as heavy metals and polycyclic aromatic hydrocarbons.

Sources of urban toxic particulate matter: first of all, automobile exhaust. Large vehicles that use diesel are the 'repeat offenders' of PM10 emissions, including buses, buses of various units, and large transport trucks. Although small cars using gasoline emit gaseous pollutants, such as nitrogen oxides, they can easily be converted into secondary particulate pollutants in foggy days, which aggravate the haze. The second is the waste gas produced by burning coal for heating in the north in winter. The third is the waste gas from industrial production.

For example, industrial kilns and boilers in metallurgical and mechanical and electrical manufacturing industries, as well as a large number of waste gas from combustion of automobile repair and painting and building materials production furnaces. The fourth is dust from construction sites and road traffic. So just like Himin said, my climate improvement, the launch of a large number of climate products, the improvement of personal climate, the improvement of household nano micro climate, and the improvement of community climate all need our efforts and our love.