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Sand mining - Wikipedia, the free encyclopedia

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Iron Ore - HowStuffWorks

It may not look like much, but this lump of iron ore is the starting point of everything from precision surgical equipment to reinforced skyscrapers.

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How Does Mining Affect the Environment? | eHow

Despite the value of mining raw materials for human use, the mining can contaminate surface water, ground water and even drinking water

Mining Pros And Cons

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