Air pollution refers to the discharge of certain harmful substances into the atmosphere during human production activities or natural activities. The concentration and existence time of these substances have affected the living environment of human beings.
The news media sometimes report that serious air pollution incidents have occurred in a certain place, which has a great impact on the local natural environment. So what exactly is air pollution? Let’s get to know it together.
The common causes of air pollution include volcanic eruptions, forest fires, rock weathering, automobile exhaust, industrial emissions, and nuclear explosions.
Air pollutants can be divided into two categories: one is aerosol pollutants; The other is gaseous pollutants.
Atmospheric pollutants according to the travel process and can be divided into primary pollutants and secondary pollutants, including secondary pollutant toxicity of pollutants is better than the last.
Air pollutants include small particle shapes such as dust and smoke, as well as pollutants such as carbon dioxide and carbon monoxide.
At present, there are more than 100 kinds of atmospheric pollutants known to mankind, and the causes of pollutants are mainly natural factors and human factors.