What are air pollutants?

Air pollutants include: dust/inhalable particles, sulfur dioxide, nitrogen oxides, carbon monoxide, nitrogen oxides, volatile organic compounds VOCs, photochemical oxides, carbon dioxide, methane, chlorofluorocarbons and so on.

1, sulfur dioxide SO2:

Sulfur dioxide is a common and important air pollutant, and it is a colorless irritating gas. Sulfur dioxide mainly comes from the combustion of sulfur-containing fuels (such as coal and oil); Smelting sulfur-containing ores (especially nonferrous metal ores with more sulfur); Production processes in chemical industry, oil refining and sulfuric acid plants.

2. suspended particulate matter TSP, such as dust, smoke, PM 10 and PM2.5

3. Nitrogen oxides, nitrogen oxides, nitric oxide, nitrogen dioxide and other nitrogen oxides are common air pollutants, which can stimulate respiratory organs, cause acute and chronic poisoning, and affect and endanger human health. Among nitrogen oxides, nitrogen dioxide is the most toxic, 4-5 times more toxic than nitric oxide. Nitrogen oxides in the atmosphere mainly come from automobile exhaust and waste gas produced by coal and oil combustion.

4. Volatile organic compounds VOCs, such as benzene, hydrocarbons and formaldehyde.

5. Photochemical oxides, such as ozone O3.

6. Greenhouse gases, carbon dioxide, methane and chlorofluorocarbons.