Which of the following is a characteristic of subsurface mining?

Question

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Subsurface mining involves digging tunnels and shafts to access mineral deposits below the surface of the earth. This can be a dangerous process as there is a risk of tunnel collapses, the release of dangerous gases and particulate matter in the air, low oxygen levels, and high heat. These conditions can be harmful to miners' health and safety. A characteristic of subsurface mining is that it is typically conducted beneath the ground and doesn't permanently alter the landscape or create silt and acidic compounds. It also does not usually involve dumping overfill into valleys.

Which of the Following Is a Characteristic of Subsurface Mining