What is smog and what is it dangerous?

Probably, in general terms, to answer that such a smog, can every modern schoolboy. And if we ask him a similar question, then, most likely, we hear about the following: "Smog is a haze over the city, which arises from excessive pollution of the air with exhaust gases."

Is it really? Let's try to find out the nature and reasons for the appearance of this type of precipitation from a scientific point of view.

What is smog? What is the nature of its occurrence? The name of this phenomenon, first appeared in London several decades ago, has purely English roots. It happened when two nouns "smoke" were added, which in Russian means "smoke" and "fog" - "fog".

This type of precipitation is typical for regions with very polluted air. A special feature is the presence in the atmosphere of a large percentage of foreign particles on which the vapor condenses. It is believed that the main culprits in the emergence of smog are the abundance of transport on the roads and certain weather conditions.

What is smog? Than it is dangerous?

Probably, hardly anyone will argue with the fact that living in cities for which he was able to become a phenomenon almost ordinary, is risky and quite dangerous for a person's life. By the way, it is the poor ecology that doctors consider guilty for the pallor of the skin of local residents. It's not a lack of vitamins, as many believe. Tanning is simply unrealistic in megacities. Smog, mixing with smoke and dust, does everything possible to prevent the sun's energy from getting to the ground.

But that's not all. Probably, the inhabitants of megacities noticed that recently our cities are more and more often threatened with heavy snowfall in the winter, and showers have become almost commonplace. And this is not accidental. Due to the fact that the air contains a huge amount of various kinds of fine solids, many drops or drops of snow are formed in it, than, say, in rural areas, which means more clouds and precipitation.

Of course, to protect yourself from all the costs of urbanization is hardly possible. Remember the recent smog in Moscow? It was at that time in hospitals in the capital that the number of patients with complaints of copious lacrimation, an annoying barking cough and frequent respiratory arrest increased . But that's not all. If harmful particles still get into our body, then their neutralization occurs in the liver, which means that the body is poisoned deeply from within.

What is smog? His examples in the world

Unfortunately, in the modern world, when in many parts of the world the existing ecological situation leaves much to be desired, the smog was not that rare.

For example, a wet type of precipitation of this type was typical for the capital of Great Britain and some other parts of this country about 100 years ago. And at that time, in his education, there were, as you know, not cars at all. Approximately in the 12th and 13th centuries in this state, residents heated their houses exclusively with coal, more and more polluting the environment. As you know, fogs for a given area are not uncommon at all. Particles of combustible fuel mixed with heavy rainfall, forming a foggy and destructive for the health of residents haze - the London smog. This kind of heating was, after all, banned by King Edward under pain of death.

Photochemical smog was first seen in Los Angeles. It, according to the point of view of modern scientists, is formed in the upper layers of the atmosphere only in the summer and under the influence of ultraviolet radiation. Industrial emissions, falling under the influence of sunlight, form more and more new, and often more toxic products.