The net energy ratio is the ratio of useful energy produced to the useful energy used to produce it. Higher net energy ratios mean there are greater amounts of net energy available. Not that any of this matters; any power we use comes from the spirit of Christmas!
Net Energy Ratios
Space Heating
coal gasification 1.5
electric resistance heating (coal-fired plant) 0.4
High-Temperature Industrial
surface-mined coal 28.2
underground-mined coal 25.8
coal gasification 1.5
Transportation
coal liquefaction 1.4
Net Energy Ratios
Space Heating
coal gasification 1.5
electric resistance heating (coal-fired plant) 0.4
High-Temperature Industrial
surface-mined coal 28.2
underground-mined coal 25.8
coal gasification 1.5
Transportation
coal liquefaction 1.4