What valuable commodity has yet to be commercially mined from ocean sediments?
A) Natural gas
B) Gravel
C) Diatomaceous earth
D) Manganese nodules

Question

Quizplus · Accepted Answer

Manganese nodules have yet to be commercially mined due to their low market value. As techniques for deep-sea mining become more advance and raw material prices increase, however, the nodules' concentration of valuable materials will almost certainly be exploited. Information can be found in the section Marine Sediments Are Economically Important.

What Valuable Commodity Has Yet to Be Commercially Mined from Ocean