Of the choices below, the greatest environmental impact would be caused by mining for ____ ore.
A) a higher-grade
B) a moderate-grade
C) a lower-grade
D) biomining
E) hydrothermal

Question

Quizplus · Accepted Answer

Mining for a lower-grade ore requires more land area to be cleared, more material to be excavated, and more waste material to be disposed of, leading to a significant environmental impact. Higher-grade ores require less excavation and waste disposal, while biomining and hydrothermal methods are considered more environmentally friendly alternatives.

Of the Choices Below, the Greatest Environmental Impact Would Be