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In page Soil erosion:

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Dust from erosion acts to suppress rainfall and changes the sky color from blue to white, which leads to an increase in red sunsets[citation needed]. Dust events have been linked to a decline in the health of coral reefs across the Caribbean and Florida, primarily since the 1970s.[5] Similar dust plumes originate in the Gobi desert, which combined with pollutants, spread large distances downwind, or eastward, into North America.[6]