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What is the cause of dust concentrations over East Asia?

Dust, one of the major aerosol constituents of the global aerosol burden, is an active component in Earth's physical, chemical and biogeochemical cycles. In addition, dust aerosols induce adverse effects on social and economic development. A case study for the dust storm in Beijing indicated total economic loss due to dust storms ranging from 2,268.5 million RMB (US$273.
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