What is classical smog? - Experts123
classicalsmog - Bing Dictionary
Smog is a common form of air pollution found mainly in urban areas and large population centers. The term refers to any type of atmospheric pollution—regardless of source, composition, or concentration—that creates a significant reduction in atmospheric visibility. Smog encompasses a broad category of air pollutants created through a multitude of processes that relate specifically to the atmospheric conditions of the formation region. In the early 1900s, London was plagued by a particular type of smog that resulted from a combination of dense fog and soot from coal combustion. In modern times, the Los Angeles Basin is often associated with dense photochemical smog, produced through a combination of vehicle exhaust and sunlight. These are two of many examples of pollution classified as smog, but they are in no way chemically related. Smog refers to a diverse category of air pollutants with varying chemical composition; however, all types of smog form a visible haze that reduces atmospheric visibility.
classical smog check? | Flickr - Photo Sharing!
Classic smog is named after London, which often has foggy conditions. In old days, people burned coal for heat, and when it was cold and foggy, they burned even more coal to stay warm. Coal contains small amounts of sulfur, which turns into SO2 and SO3 gases when burned (together referred to as SOx). SOx combines with H2O moisture in the air to form sulfuric acid, H2SO4. H2SO4 droplets can deposit on structures, corroding them. H2SO4 droplets can also be inhaled, causing lung damage. This type of smog episode would persist over several days and nights, until the foggy or cold weather stopped and people stopped burning so much coal.