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Sand and dust storms are common meteorological hazards in arid and semi-arid regions. They are usually caused by thunderstorms – or strong pressure gradients associated with cyclones – which increase wind speed over a wide area. These strong winds lift large amounts of sand and dust from bare, dry soils into the atmosphere, transporting them hundreds to thousands of kilometres away. Some 40% of aerosols in the troposphere (the lowest layer of Earth’s atmosphere) are dust particles from wind erosion.
Weather, climate and water impact on agriculture and fisheries, energy, transport, health, insurance, sports, tourism and many more socio-economic sectors. WMO promotes the application of meteorological, climatological, hydrological and oceanographic information in all human activities.
Human health and the wellbeing of individuals and communities are closely linked with weather and climate conditions. Through its Members, WMO provides weather and climate services to the public health community. Furthermore, in 2014, WMO partnered with the World Health Organization (WHO) to establish a unique Joint Office for Climate and Health, located at the WMO.