Coal is formed from the vegetation of the carboniferous era, which was protected from complete decay by overlying water-washed earth deposits.
It is mainly used as a fuel to generate power for steam engine$ factories and electronic plants.
Coal is formed from the vegetation of the carboniferous era, which was protected from complete decay by overlying water-washed earth deposits.
It is mainly used as a fuel to generate power for steam engine$ factories and electronic plants.