Causes include copper or iron deficiency and lead poisoning.

干扰的因素包括铜，铁缺乏和铅中毒。

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The materials from e-waste include iron, copper, gold, silver, and aluminum materials that could be reused, resold, salvaged, or recycled.

电子垃圾中的材料包括铁、铜、金、银和铝，这些材料可以被重复利用、转售、废物利用或回收。

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Money is not evil any more so than copper, lead, tin, or iron that you may find in the ground.

金钱并没有害处，就像铜、铅、锡或铁这些一样，你能在地上找到这些。

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And what happens when Afghanistan needs copper or oil or iron for its own development?

CNN: Ancient site needs saving not destroying

Silver and copper are smaller markets, but their adherents argue that the industrial demands for the shiny stuff by nations that must build out their infrastructure products such as the fast speed transportation system in China or the ports of India, Thailand another emerging markets clearly suggest a shortage of silver and copper, possibly iron ore as well.

FORBES: Smart Money Is Long Gold, Silver, Copper, Oil And Zero Coupon Treasuries