The reason for the depletion of coal resources in the Balkans

The reason for the depletion of coal resources in the Balkans is that it is mined out. Coal is a non-renewable resource, and when it is mined, it is gone. Coal is a solid combustible mineral that is formed gradually from ancient plants buried underground and undergoing complex biochemical and physicochemical changes. Coal is known as the black gold, industrial food, it is the eighteenth century since the human world to use one of the main energy sources, into the twenty-first century, the value of coal is not as big as before.