The United States has active mines within its boundaries that are sufficient to maintain a steady supply of all strategically important metals.
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Q39: Which of the following is NOT an
Q40: Open-pit mining utilizes ore that lies close
Q41: Because it can be split easily into
Q42: Which of the following nonmetallic resources has
Q45: The most important mineral resources,including ores,can be
Q46: Which mineral resources are considered renewable?
A)base metals
Q47: As compared to coal mining,there is virtually
Q48: Ore processing can have environmental consequences,including _.
A)acid
Q49: A drawback to mining sulfides is the
Q49: _ are mined by the United States
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