If one tenth the amount of government subsidy money given to nuclear and oil power development was given to geothermal, PV and wind, we could dispense with hydrocarbon and nuclear energy completely. Oil could then be used in a sustainable way as a lubricant, rather than a fuel.
Senator Bernie Sanders' Congressional study confirmed that over 12 billion dollars has been extracted from the US taxpayer on nuclear power plants that are supposedly private. Also, the so-called "oil depletion allowance", when added up would be a much higher figure.
We have been taken for a ride by con men with pollution and sickness as our reward.
I take issue with the 1.5 km requirement to get cost effective geothermal energy. Right now they are drilling for oil in the ocean at several times that depth and nobody is saying it's not 'cost effective'.
As the other poster here mentioned, a 30 to 70 percent reduction in heating and cooling costs can be easily achieved and that would erase any (contrived or otherwise) energy crisis or shortfall. Of course, that would force oil, gas and nuclear power corporations to cut their prices so perhaps that is why it hasn't happened yet.