The journey from tawny earth to copper wire begins with an explosion. Or 2,697 explosions, to be precise. At the 1,100-acre main pit of Kansanshi copper mine in northern Zambia, a lattice of six-inch blast holes punctuates the ribboned moonscape. At 3 p.m., the ground erupts in an echelon pattern, sending plumes of dust skyward.
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