Natural aerosols are produced by sea salt, desert dust, volcanic eruptions and smoke from forest fires.

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The snow comes across the Great Salt Lake Desert, hits the Wasatch mountain range and gets pushed up and turned into light, but consistent powdery snow.

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It must be buried under a mountain, sunk to the bottom of the sea, or placed under a thick layer of salt deep under a desert for instance.

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On the short drive from town out to the salt flats, the high desert gleamed under the morning sun.

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The northern third of the country is dominated by the Atacama Desert, a spectacular region of salt flats, geysers and volcanic peaks.

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Known as the driest, highest desert in the world, the Atacama Desert is full of surprises: mountains, volcanoes, salt flats, geysers, wetlands, hot springs and an abundance of animal and plant life.

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During its golden age, Timbuktu was a thriving desert trading town at the heart of important trade routes for gold and salt, and a major intellectual and spiritual center, which played a key role in the spread of Islam in Africa.

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