Tag: dust

Global Organization

Policy context In 2007, the 14th World Meteorological Congress highlighted the importance of the SDS problem and endorsed launching of the implementation of a Sand and Dust Storm Warning Advisory and Assessment System (SDS-WAS) (WMO 2015). SDS-WAS was established in response to the intention of 40 WMO member countries to improve capabilities for more reliable […]

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What causes haze?

Around large urban areas, you may have noticed the existence of dusty-looking clouds blocking a clear view of the city skyline at times. This is usually not fog or clouds, rather something known as haze. Haze forms when weather conditions remain stagnant for a considerable length of time. This enables the dust, smoke and other […]

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Air Pollution

Haze often occurs when dust and smoke particles accumulate in relatively dry air. When weather conditions block the dispersal of smoke and other pollutants they concentrate and form a usually low-hanging shroud that impairs visibility and may become a respiratory health threat. Industrial pollution can result in dense haze, which is known as smog. Since 1991, haze has been a particularly […]

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