PPT-Every year > 25,000 pounds (11.3 metric tons) of new non-fuel minerals must be provided PowerPoint Presentation

we use Human History Stone age Copper Age Bronze Age Iron Age 7 metals of antiquity Gold 8000 yra copper 6200 yra silver 6000 yra lead 5500 yra tin 3750 yra iron

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Published on 2022-06-28

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