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haze,suspension in the atmosphere of minute dust or salt particles that are not individually seen but that nevertheless reduce visibility. So-called damp haze and dry haze produce different optical effects because the particles of each are of different sizes, with the dry haze particles being smaller. Damp haze may develop from dry haze when water condenses on moisture-absorbing dry haze particles. Continuation of this condensation leads to the formation of fogfog,
aggregation of water droplets or ice crystals immediately above the surface of the earth (i.e., a cloud near the ground). A light or thin fog is usually called a mist. Fog may occur when the moisture content of the air is increased beyond the saturation point.
..... Click the link for more information. . A hazy condition often occurs in the summer and affects large areas from cities to mountains. Such a haze is often caused by excessive amounts of pollutants resulting from combustion; for example, the Smoky Mountain haze in Tennessee is ascribed to sulfate particles.
atmospheric turbidity from the presence of solid particles (smoke, soot, dust) suspended in the air. Haze sometimes reduces visibility to as little as 1 km and, when very heavy, to hundreds or only dozens of m. Haze occurs in steppe and desert regions; in other areas, it can be observed in air masses that come from steppes and deserts. Severe haze accompanies dry winds. Haze over large cities (smog) is due to pollution of the air with smoke and dust of local origin.