Word: zinc
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Dates: during 1980-1989
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...already alarmingly dependent on imports for many of its most critical industrial raw materials. In all, 98% of America's manganese, 97% of its cobalt, 93% of its aluminum and 91% of its chromium come from foreign ores. More than 50% of its tin, nickel, zinc and tungsten ores are also imported. The supply of several of these materials is susceptible to interruption because they come from either the Soviet Union or from unstable southern African nations that suffer serious internal troubles. The most important minerals include...