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Copper is a ductile, coloured metal that has very high thermal and electrical conductivity. Copper was the first metal to be used by man (probably as early as 7000 BC ...
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China's red-hot coal market is expected to fall to a ... Shanxi miners cut high-sulfur coking coal prices on slack sa... 2017-10-13; China's seaborne thermal coal ...
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Afghanistan: Land of the Afghans Slavery48,000 BC: Farming Communities found by Smithsonian
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