Question

which of these is an advantage of surface mining?
a. the mineshafts sometimes collapse, trapping miners.
b. the mines change the environment where they are located.
c. working aboveground increases safety for miners.
d. runoff from the mines can pollute local watersheds.

Explanation:

• Option A describes a disadvantage (mineshaft collapse).
• Option B is a negative environmental impact (environmental change), a disadvantage.
• Option C is an advantage as working aboveground (surface mining) generally has better safety compared to underground mining.
• Option D is a negative environmental impact (pollution), a disadvantage.

Answer:

C. Working aboveground increases safety for miners.