Environmental protection manuscript: How much do you know about air pollution?

The so-called air pollution refers to the phenomenon that harmful substances enter the atmosphere and cause harm to human beings and organisms. If it is not controlled and prevented, it will seriously destroy the ecosystem and human living conditions. The substances that cause air pollution are carbon monoxide, sulfur dioxide, nitric oxide, ozone, smoke and dust, salt particles, pollen, bacteria and buds. Some air pollution is caused by natural factors, such as forest fires and volcanic eruptions. There are also human factors such as automobile exhaust, industrial waste gas, smoke and dust, and explosion. Among them, human factors are the main pollution to the atmosphere, especially the pollution caused by modern transportation and industrial production to the urban atmosphere is more serious. The near-earth atmosphere tens of meters above the ground is the living space for human beings and creatures. The quality of this layer of air directly affects human production and life. In recent years, due to the development of transportation, a large number of automobile exhaust gases react with some substances in the air, producing new substances such as nitrogen oxides, ozone and acetaldehyde, which are very harmful to human body. The degree of air pollution in the surface layer is closely related to meteorological conditions, with obvious seasonal and daily changes. Generally, in windless weather, air pollution is the most serious in the morning and evening in winter. In summer, due to the unstable atmosphere, pollutants are easy to spread to the sky, so the general pollution will not be too serious.