It was used for most power needs
Coal is used as a source of power in all 50 US states. It is the main source of electric power in the US acconting for ~43%.
coal is the main source of electricity in Germany
coal was the main source at that time
coal
The main source of energy in Romania are the thermoelectric units (with coal or methane).
coal
There are many reasons coal is important to life on earth, a main one is power. The world runs on electricity now, and coal is a main source of power. also fires, coal has always been important in fires.
most likely, it's coal
most likely, it's coal
One of the uses of coal is for power.
an energy source
coal