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Mining waste rock
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Worldwatch Institute, 1997

 

 

Uploaded on Saturday 25 Feb 2012 by GRID-Arendal

Mining waste rock

Year: 2005
From collection: Vital Waste Graphics
Author: Philippe Rekacewicz, UNEP/GRID-Arendal
Description:
Regardless of the type of raw material, its extraction always comes with an environmental cost. Most mining leaves a lasting and damaging environmental footprint. For example, during the extraction of common metals like copper, lead or zinc from the earth both metal-bearing rock, called ore, and “overburden”, the dirt and rock that covers the ore are removed. At a typical copper mine around 125 tonnes of ore are excavated to produce just one tonne of copper. The amount of earth moved is mind-boggling and mining now strips more of the Earth's surface each year than does natural erosion.
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