Prior to installing the AHS Coal Gun boiler our house was all electric. 45% of electricity is made from coal, but the process of generating electricity from coal is highly inefficient, and at your local electrical utility the BTU value of the electricity coming out is only about 40% (at most) of the BTU value of the coal going in. But with my AHS Coal Gun I'm recovering fully 65% or more of the available BTU value in the coal as heat, for both room heating and DHW.
The bottom line is that by burning the coal myself our homes carbon footprint is appreciably lower than it was when our house was all electric. Save the planet. Burn coal for heat, and don't heat your house with electricity.
UPDATE: I just saw a link which stated that the average coal fired electrical plant uses 1.07 lbs. of coal per KWH produced. If the average 1 lb of coal used for electrical generation has 10,000 BTU's, and we know that 1 KWH = 3,412 BTU's, then the efficiency of the average coal fired electrical utility is 3,412/10,000 x 100 = 34%
The conclusion is that my carbon footprint is roughly half that of a coal fired electrical utility plant.