Secure energy for hundreds of years
Coal is a secure energy source. It has several producers around the world, resulting in stable prices and availability of reasonably priced coal.
Coal has been estimated to be accessible for 200 years, whereas the known reserves of oil and natural gas will be sufficient for 40-60 years.
Coal is easy to transport, store and use, which also makes it an important fuel for maintenance security. Coal can be stored for unusual conditions.