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Black and white: Processing plant of the historic nitrate mine Chacabuco in the Atacama Desert of Chile.

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Title: Black and white: Processing plant of the historic nitrate mine Chacabuco in the Atacama Desert of Chile.

Black and white: Processing plant of the historic nitrate mine Chacabuco in the Atacama Desert of Chile.

Credit: Gerhard Hüdepohl / atacamaphoto