Many factors such as sudden changes in lifestyle, continuous growth of the world’s population and the
advancement of technologies used in combustion, industrial and agricultural processes cause the continuous
evolution of the characteristics of atmospheric pollution. Tropospheric ozone (O3) in the lower boundary layer is one of the main causes of air pollution that has increased globally since the end of the 20th century. Under complex photochemical reactions and processes, ozone is formed in the lower boundary layer of the troposphere.
In general, volatile organic compounds (VOCs) and carbon monoxide (CO) were considered the key precursors of the O3 formation process, which play a role in the deterioration of air quality in urban areas. Since tropospheric O3 can cause various adverse effects on humans and ecosystems, many domestic mitigation measures should be implemented to control human emissions to significantly reduce NOx and improve air quality.
Chlorine atoms can catalytically destroy stratospheric ozone, leading to increased levels of biologically harmful
ultraviolet radiation at Earth’s surface and affecting air quality. Since active chlorine gases are mainly removed in the troposphere by various processes, the atmospheric life of these gases is relatively short, but the gases that are not removed or destroyed by tropospheric processes have a much longer life.
All the contents collected in this file are from the following articles and I have no claim to present them completely as my own work.