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 […]
Read MoreAir 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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