Experts are particularly concerned about the U.S. depletion and lack of national reserves of manganese, cobalt, chromium, and platinum because they are nonrenewable ____ resources.
A) security metal
B) strategic metal
C) biogenic metal
D) recyclable metal
E) trace metal

Question

Quizplus · Accepted Answer

Strategic metals are essential for national security because they are used in military technologies, and their depletion could harm the country's economy and defense capabilities. Manganese, cobalt, chromium, and platinum are all strategic metals, and their lack of national reserves is a cause for concern. Biogenic metals are formed by living organisms, while recyclable metals can be reused after being processed, and trace metals are present in small amounts in nature. Security metal is not a commonly used term in the context of natural resources.

Experts Are Particularly Concerned About the U