What is Smog, what types and health risks

The termsmogderives from the junction of the English wordssmoke, which means smoke, andfog, which means fog and is a term used to describe visible air pollution, very common in urban areas.

THEsmogit consists of the result of several chemical reactions between several primary pollutants, which can derive from car emissions, industry emissions, fires, among others, which depend on the climate, since its composition is also influenced by the sun.

This type of air pollution can be harmful to health, as it can cause irritation in the eyes, throat and nose, affect the lungs, cause coughing to worsen respiratory diseases, such as asthma, for example, in addition to harming plants and animals. animals.

What types ofsmog

THEsmog Can be:


THEsmog Photochemical, as the name implies, occurs in the presence of light, it is common on very hot and dry days and comes from the incomplete burning of fossil fuels, and emissions from motor vehicles.

In the composition ofsmog photochemical, primary pollutants such as carbon monoxide, sulfur and nitrogen dioxides, and secondary pollutants such as ozone, which are formed under the influence of sunlight, can therefore be found.smog Photochemistry generally forms on drier, hotter days.

2.Smog industrial, urban or acidic

THEsmog industrial, urban or acid, occurs mainly in winter, and is composed of a mixture of smoke, fog, ash, soot, sulfur dioxide and sulfuric acid, among other compounds harmful to health, bringing many risks to the population.

This kind ofsmog it has a dark color, which is due to the combination of these materials, which come mainly from industrial emissions and the burning of coal. The main difference between this type ofsmogit's thesmog photochemical, is that the first occurs in winter and the photochemical needs sunlight to form, with more tendency to occur in summer.

Health risks

THEsmog it can cause changes in the immune system, worsening of respiratory diseases, such as asthma, dryness of protective membranes such as nose and throat, eye irritation, headache and lung problems.

Also know the risks of air pollution that are not visible.

What to do

On days when the smog it is visible in the air, exposure should be avoided, especially near areas with a lot of traffic, restricting hours outdoors, especially when exercising.

To reduce the emission of pollutants, active and sustainable mobility, such as cycling, walking and public transport, increasing green areas, removing old vehicles from circulation, reducing open fires and encouraging industries to use equipment should be preferred. as catalysts and filters to retain smoke and pollutants.