On the causes of weather deterioration from the perspective of environmental protection

Air pollution is also called air pollution. According to the definition of the International Organization for Standardization (ISO), air pollution usually refers to the phenomenon that some substances enter the atmosphere due to human activities or natural processes and show sufficient concentration in a sufficient time, thus endangering human comfort, health and welfare or the environment.

In other words, as long as a substance exists in sufficient quantity, nature and time and has an impact on human beings or other creatures and property, we can call it an air pollutant; And the phenomenon caused by its existence is air pollution.

Reason:

The atmosphere is a mixture of nitrogen, oxygen, carbon dioxide, water vapor and solid impurity particles in a certain proportion. Just do it.

atmospheric pollution

As far as dry air is concerned, in terms of volume, in the standard state, nitrogen accounts for 78.08%, oxygen accounts for 20.94%, rare gas accounts for 0.93%, carbon dioxide accounts for 0.03%, and the volume of other gases and impurities is about 0.02%. Various natural changes often cause changes in atmospheric composition.

For example, when a volcano erupts, a large amount of dust, carbon dioxide and other gases are injected into the atmosphere, which causes the volcanic eruption area to be filled with smoke and toxic gases to smoke people; Large-scale forest fires caused by natural causes such as lightning will also [1] increase the content of carbon dioxide and smoke particles.

Pollution source:

Air pollution sources are the sources of air pollutants, mainly including the following:

(1) Industry: Industrial production is an important source of air pollution. There are many kinds of pollutants discharged into the atmosphere by industrial production, including soot, sulfur oxides, nitrogen oxides, organic compounds, halides, carbon compounds and so on. Some are smoke and some are gas.

(2) Living stoves and heating boilers: A large number of living stoves and heating boilers in cities need to consume a lot of coal, and coal will release a lot of harmful substances such as dust, sulfur dioxide and carbon monoxide to pollute the atmosphere during combustion. Especially when heating in winter, it often makes the polluted area filled with smoke and makes people cough, which is also a pollution source that cannot be ignored.

(3) Transportation: Cars, trains, planes and ships are the main means of transportation at present, and the waste gas produced by burning coal or oil is also an important pollutant. Especially, the cars in cities are large and concentrated, and the pollutants emitted by exhaust gas can directly hit people's respiratory organs, which has caused serious air pollution in cities and has become one of the main sources of air pollution in big cities. The exhaust gas emitted by automobiles mainly includes carbon monoxide, sulfur dioxide, nitrogen oxides and hydrocarbons, and the first three substances are very harmful.

(4) Smoke from forest fires.