Many of the most valuable metals are mined outside U.S. borders and are used in everyday electronic materials.
Some producers, given their efficiencies and their higher concentrations of the more valuable metals, will still be profitable at these prices.
Still the world's greatest source of diamonds, it is also the world's top-ranked producer of gold, platinum and several other valuable metals.
And there are also likely to be deposits of platinum and other valuable metals contained in asteroids that have crashed into the moon.
The company says surveys have revealed huge numbers of so-called nodules - small lumps of rock rich in valuable metals - lying on the ocean floor south of Hawaii and west of Mexico.
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For decades, the export of electronic waste from the United States and Europe to Asia has raised concerns about the impact on local environments and the low-paid workers who dismantle toxic-laden computers and other gear to recover valuable metals and parts.
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When something is valuable people will go to great lengths to recycle it: and gold and the precious metals are valuable so people do go to great lengths to recycle them.
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Copper can also be mixed with other metals to make valuable alloys such as bronze, pewter and brass.
Some materials in solar modules such as silicon and rare metals could be more valuable in the future, providing an additional incentive to recycle.
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Next is the Primary Metals Division is the most valuable division for Alcoa accounting for almost 42% of the stock value.
Like the 1970s, Tillman sees this decade as one in which financial assets become less valuable than hard assets such as real estate, metals, raw materials and even collectibles.
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