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Monday, May 27
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A view from the side of the copper mine in Calama, Chile, shows the Concentrator process, where the metals in the water attach to the air bubbles and float to the surface. Suzanne Perkett

Copper Mine

A view from the side of the copper mine in Calama, Chile, shows the Concentrator process, where the metals in the water attach to the air bubbles and float to the surface.

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