What environmental impacts are caused by both surface mining and underground mining selected to correct answers

Question

Sinkhole formation after mining is complete release of underground gases destruction of ecosystems local water contamination destruction from overburden

Answer 1

Both surface mining and underground mining can cause significant environmental impacts. Here’s how the selected impacts apply to each type of mining:

1. Sinkhole formation after mining is complete: This is primarily associated with underground mining, as the process can lead to instability in the ground above the mined areas, which may cause sinkholes.

2. Release of underground gases: This can occur in both surface and underground mining, especially if the mining activities disturb coal seams or other deposits that contain gases.

3. Destruction of ecosystems: Both surface mining and underground mining can lead to habitat destruction. Surface mining often clears large areas, while underground mining can disrupt surface ecosystems if not managed properly.

4. Local water contamination: Both mining methods can lead to water contamination. Surface mining can cause runoff that contaminates local water sources, while underground mining can lead to the leaching of toxins.

5. Destruction from overburden: This is primarily an issue in surface mining, where layers of soil and rock (overburden) are removed to access minerals, leading to landscape alteration, ecosystem destruction, and potential erosion.

In summary, the correct answers regarding the environmental impacts caused by both surface mining and underground mining include:

• Sinkhole formation after mining is complete (more applicable to underground mining)
• Release of underground gases
• Destruction of ecosystems
• Local water contamination

The impact of "destruction from overburden" is more specific to surface mining.