Why is the haze getting worse and worse?

First: it’s car exhaust. Large vehicles using diesel are "heavy offenders" of PM10 emissions, including large buses, shuttle buses of various units, and large transport trucks. Sources of toxic particulate matter in cities: First, car exhaust. Diesel vehicles are "heavy offenders" of emitting fine particulate matter. Although small cars using gasoline emit gaseous pollutants, such as nitrogen oxides, they can easily be converted into secondary particulate pollutants in foggy weather, aggravating smog.

Motor vehicle exhaust is the main component of smog particles. The latest data shows that motor vehicle exhaust accounts for 22.2% of Beijing’s haze particles, coal burning accounts for 16.7%, and dust accounts for 16.3%. Industry accounts for 15.7%. However, with the advancement of automobile technology and the improvement of oil quality, environmental managers have found that vehicle exhaust does not play a decisive role in the formation of haze weather. However, as some cities with a large number of cars, managers still need to control vehicle emissions. standards to avoid the formation of haze weather.

Third: Waste gas emitted from industrial production. For example, metallurgy, kilns and boilers, mechanical and electrical manufacturing industries, as well as a large amount of waste gas emitted from the combustion of auto repair painting and building materials production kilns. Fifth: The particle size of growable particles, bacteria and viruses is equivalent to PM0.1-PM2.5. When the humidity and temperature in the air are suitable, microorganisms will adhere to the particles, especially the particles of oil smoke, and the microorganisms will absorb the oil droplets. Later, it is transformed into more microorganisms, causing the growth of biological toxic substances in the haze to increase

. Sixth, dust "haze" will also be produced during home decoration. The diffuse dust in the room is not only harmful to the health of workers and users, but also increases the burden of cleaning. When the dust is severe, it also brings many hidden dangers to the decoration project.

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