Although rare earths are common in the earth's crust, they are classified as rare because they are widely dispersed and rarely found in exploitable concentrations. China currently dominates the world's production of rare earths, accounting for 70% of the global supply. However, certain regions of southern Africa have significant reserves.

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Although rare earths are common in the earth's crust, they are classified as rare because they are widely dispersed and rarely found in exploitable concentrations. China currently dominates the world's production of rare earths, accounting for 70% of the global supply. However, certain regions of southern Africa have significant reserves.