Zinc is the 24th most abundant element in the Earth´s crust and the world´s reserves are estimated at 2000 million tonnes. Nowadays 75% of zinc used in the combined total employed in building applications, the metallurgical industry and for medicinal purposes comes from mines. In order to increase the efficiency of zinc extraction (and therefore preserve the reserves), the mining industry is investing in new techniques and technologies. The remainder comes from recycling or from the refinement of the secondary zinc.
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