Rare earth elements are not actually ____,but they are difficult to find in high enough concentrations and process at an economically viable price.
A) economic
B) rare
C) mineable
D) sustainable
E) recoverable

Question

Rare earth elements are not actually ____,but they are difficult to find in high enough concentrations and process at an economically viable price.​
A) ​economic
B) ​rare
C) ​mineable
D) ​sustainable
E) ​recoverable

Quizplus · Accepted Answer

Rare earth elements are actually not rare in the Earth's crust, but they are difficult to find in high enough concentrations and process at an economically viable price.

Rare Earth Elements Are Not Actually ____,But They Are Difficult