A dense, atmospheric mixture of smoke and fog
or chemical fumes, commonly occurring in urban or industrial areas. Smogs
generally occur when there is radiation fog. If the air remains calm, the
fog gets worse, and more industrial grime accumulates, as it is unable to
escape into the atmosphere. The water droplets condense around the pollutants
forming thick fog. One of the worst areas for smog is Los Angeles, California.
It is a result of the exhaust emissions of the city's vast number of cars.
The air pollution is exacerbated by Los Angeles: topography: it lies in
a large basin, noted for inversions of temperature, which create ideal conditions
for the formation of fogs and smogs.
|Smog over Los Angeles
PHENOMENA AND STRUCTURES