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13 4 $begingroup$ La Rinconada, Peru is notable because it has an effective oxygen concentration of only 11%, leading to the need for special techniques just to keep a fire going, and preventing the use of combustion-based heat for smelting iron, as they simply can't get hot enough under the oxygen-starved conditions. However, with today's technology, and a big enough power line and/or natural gas pipe running up the mountain, would it be possible to convert iron ore into crude metallic iron (it only needs to be good enough for an electric arc furnace to use) under these conditions? technology hard-science atmosphere metalworking share | improve this question ...