probably answer in general terms, what could could every modern student.And if we ask him the same question, then, it is likely to hear something like this: "Smog called haze over the city, which is the result of excessive air pollution by exhaust gases."
Is it really?Let's try to clarify the nature and causes of this type of rainfall from a scientific point of view.
What could?What is the nature of its origin? name this phenomenon first emerged in London several decades ago, has a purely British roots.It happened at addition of two nouns «smoke», which translated into Russian means "smoke" and «fog» - «the fog."
This type of precipitation is characteristic of regions with very polluted air.A special feature is the presence in the atmosphere of a large percentage of foreign particles, which condenses steam.It is believed that the main culprits in causing smog are an abundance of transport on certain roads and weather conditions.
What could?How is it dangerous?
probably hardly anyone would argue with the fact that living in urban areas, which could become almost an everyday phenomenon, risky and quite dangerous to human life.By the way, bad ecology doctors feel guilty pale skin locals.The thing is not in the lack of vitamins, as many believe.In metropolitan areas to sunbathe simply unrealistic, becausewas able to mix with smoke and dust, it is doing everything possible to avoid getting into the ground solar energy.
But that's not all.Probably urban dwellers have noticed that in recent years our city in winter are increasingly threatened by heavy snowfalls and rainstorms have become almost commonplace.This is no accident.Due to the fact that air contains a large quantity of various kinds of fine solid particles is formed in it many times more droplets or snowflakes, than, for example, in rural areas, and thus result in more clouds and rain.
course, to protect against all the costs of urbanization is hardly possible.Remember the recent smog in Moscow?It was during this period in the hospitals of the capital increase in the number of patients complaining of excessive tearing, annoying barking cough and often breath-hold.But that's not all.If harmful particles still fall within our body, the neutralization occurs in the liver, and therefore, deep inside the body is poisoned.
What could?His examples in the world
Unfortunately, in today's world, when many parts of the world prevailing environmental situation leaves much to be desired, could not - it's not such a rare phenomenon.
For example, the wet type of precipitation this type was characteristic of the British capital and some other parts of the country about 100 years ago.And while the blame for his education was, as you know, not cars.Approximately 12-13 century in this state residents heat their homes with coal only, are increasingly polluting the environment.As you know, the mists for the area - this is not uncommon.The particles of combustible fuel is mixed with heavy rainfall, forming impenetrable and is detrimental to the health of the inhabitants of the haze - London smog.Such heating was eventually banned by King Edward under penalty of death.
Photochemical smog was first spotted in Los Angeles.He is, according to the point of view of modern scholars, is formed in the upper atmosphere only in the summer and by ultraviolet radiation.Industrial emissions, falling under the influence of sunlight, forming ever new, and often more toxic products.
