>OTOH, the power plant probably has a rail connection or pipeline for oil, and the marginal energy cost of transporting an additional unit of oil to the power p

>OTOH, the power plant probably has a rail connection or pipeline for oil, and the marginal energy cost of transporting an additional unit of oil to the power plant is probably quite low compared to the marginal energy cost of transporting the same additional unit of oil to your house. Uh, I have a natural gas pipe coming directly into my home, along with nearly everyone in my state, and also region. Electric heating is more efficient than natural gas, but electricity is more expensive per BTU, at least where I live.