Smog
Smog
Smog (/smɒɡ/; from smoke and fog) is a type of intense air pollution. The word "smog" was coined in the early 20th century, and is a contraction of the words 'smoke' and 'fog' to refer to smoky fog due to its opacity, and odor.
Etymology
The term "smog" was first used by Dr. Henry Antoine Des Voeux in his paper, "Fog and Smoke" for a meeting of the Public Health Congress in London in 1905. The term is a portmanteau of the words 'smoke' and 'fog', and was then popularized in 1911 by Des Voeux's use of it in a report to the Coal Smoke Abatement Society of Great Britain.
Types of Smog
There are two types of smog, namely Sulfurous smog and Photochemical smog. Sulfurous smog is caused by a high concentration of sulfur oxides in the air and is common in cool, damp and industrial areas. Photochemical smog, on the other hand, is caused by a reaction between sunlight, nitrogen oxides, and volatile organic compounds in the atmosphere.
Health Effects
Exposure to smog can lead to several different types of health problems due to the pollutants that it contains, including Sulfur dioxide, Particulate matter, and Ground-level ozone. These health problems can include difficulty in breathing, aggravation of existing respiratory and cardiovascular disease, and even premature death.
Prevention and Control
Prevention and control of smog can be achieved through a variety of strategies, including the use of cleaner fuels, stricter emission standards, and the development of alternative energy sources. Public awareness and understanding of the dangers of smog are also crucial for its prevention and control.
See Also
External links
- Medical encyclopedia article on Smog
- Wikipedia's article - Smog
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