Smog - city smoke

In the eighties newspapers have written that in the capital of Japan - Tokyo, two hundred and fifty students were victims of smog. Children are, quite simply, was poisoned by the decay products of automobile emissions. Toxic substances formed as a result of the collapse under the action of sunlight, causing tearing, coughing and headaches. Two hundred and seventy days of the year hanging over Los Angeles, a city that is surrounded by mountains, the poisonous fog, in which many of the combustion products of oil. "By noon, - writes one of the authors of the journal 4Neeshnl Geographic - the air is similar to mustard gas. No wind, no movement in the atmosphere. Approximately five hours of the city average, though the patient under general anesthesia. Los Angeles had been poisoned by smog so thick and toxic that even people with healthy hearts and lungs are not encouraged to leave their homes. " Smog - a thick, dirty fog - hangs over many big cities in the world. As it is formed? For condensation of water vapor into water droplets of a cooling air is not enough. It is necessary that the air floated the so-called condensation nuclei. They are so small that the naked eye can not see them. These tiny specks of dust, smoke particles, dust, pollen, flowers, and various other volatile particles. On them and settles water vapor. In the cities the air is clogged with soot and dust significantly higher than outside the city limits. Here the particles to condense the steam much more. With sufficient moisture appears peculiar mist, which is called smog. Smog is sometimes called the "London fog". At one time the whole of London was heated by ordinary fireplaces that burn coal. These fireplaces and gave a huge mass of smoke and soot. During a quiet, windless weather over London a huge mustard-colored veil hung smog. From November until mid-January over the city hung a curtain of dense fog. At this time, the city is like iodine translucent hood that does not permit sunlight, especially that part of its spectrum, which is called the ultraviolet and which is particularly important to people. Doctors know that vitamin D is formed in the human body under the influence of ultraviolet rays. French scientists found that the light sooner dead people often are not pink, as it should be a healthy person. They are covered with a dark patina. And most of these people were non-smokers. Smog - the revenge of the nature of man, who, without official attention for the environment.