Large Potato-Sized Nodules Found on the Sea Floor Contain Manganese

question 29

Multiple Choice

Large potato-sized nodules found on the sea floor contain manganese, copper, and nickel. What is the main reason these minerals have not been mined?

• A) it would cost more to mine the minerals than they are currently worth
• B) international agreements for seafloor mining do not yet exist
• C) nobody is really sure where these nodules are located
• D) the metals are of limited use and abundantly available elsewhere
• E) none of these statements is correct

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