Why An Underground Mine Might Be Better For Local Ecosystem Than A Surface Mine?

Surface mining is suitable for large, low-grade ore deposits which occur below a thin layer of rock or sand. Underground mining is used for small, high-grade deposits covered with a thick soil or rock above the ore. Alluvial mining is suitable for deposits in sand and riverbeds.

Explanation:

Environmental impacts of mining can occur at local, regional, and global scales through direct and indirect mining practices. Impacts can result in erosion, sinkholes, loss of biodiversity, or the contamination of soil, groundwater, and surface water by the chemicals emitted from mining processes.