Because the South is a region where there is not enough electricity and electric rate increases more than other regions o.k. And imports of coal, it is necessary to use a boat for transport.
Because the South is a region where there are not enough electricity to meet demand. And a power consumption rate increased more than other sectors have. And imports of coal, it is necessary to use ships to transport.
Because the southern region with electricity generating capacity is not enough demand. And the rate of electricity increased more than other regions. And imports of coal that is necessary to use in transportation.