How did the smog weather in Beijing come from?

Haze, also known as haze, refers to dust, sulfuric acid, nitric acid, organic hydrocarbons and other particles in the air that make the atmosphere turbid, blur the vision and worsen the visibility. If the horizontal visibility is less than 10000 meters, the visual distance obstacle caused by this non-aqueous aerosol system is called haze or haze. Fog is an aerosol system composed of a large number of tiny water droplets or ice crystals suspended in the air near the ground, and it is the product of condensation (or sublimation) of water vapor in the air near the ground.

Hazy weather leads to low visibility in a large area of the city. When the relative humidity is high in the morning or at night, fog forms; During the day, the temperature rises, the humidity drops, and it gradually turns into smog. Under such circumstances, many netizens ridiculed themselves as "human flesh vacuum cleaners" and ridiculed that "the air is so bad that countless beautiful women wear masks", and some netizens used "broken charts" to describe the PM2.5 concentration in Beijing.

The British Broadcasting Corporation (BBC) reported on June 65438+1October 12 that the air pollution in Beijing, the capital of China, has reached the level of endangering people's health. Both official and unofficial monitoring results show that the pollution index on 12 has rapidly exceeded the risk level set by the World Health Organization.

How is the smog weather in Beijing formed? According to the report, the main causes of air pollution in China are large-scale coal consumption and the use of motor vehicles. There are both meteorological reasons and pollution reasons.