There are different types of mining activities that depend on the extraction magnitude, the size and deepness of the mineral deposit, and its costs. <em>The least harmful to the environment is </em><u><em>Subsurface mining</em></u><em>. Option C. </em>
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There exist different types of mines depending on the extraction magnitude and methods.
The method used to extract minerals depends on the mineral deposit, the deposit size and deepness, and the work costs.
The environmental and health problems that mining activities produce involve the extraction process, transport of material, mineral processing, and the residues and wastes left at the extraction site that remain there for too much time and disperse to other areas polluting water, air, and soil.
Among the types of mines, the less destructive might be subsurface mining.
This type of mining has a less environmental impact because the disturbance caused on the land surface is minor than the impact caused by surface mines.
However, it still has harmful effects on the water and soil by contaminating them with acids and metals and intercepting aquifers.
Other forms of life are affected as well because of this pollution.
Workers are exposed to even more dangerous conditions.
Although subsurface mines have less permanent damage to the environment, they are still damaging and lack control policies.
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