Guest blog by S. A. Shelley: For several years, Bitcoins and similar digital currencies have been the rage, heralded as a true medium of exchange and value that is independent of government manipulation, as is seen with all fiat currencies. However, Bitcoins in particular have also generated rage amongst environmentalists because the energy consumption and carbon emissions required to support Bitcoins approach the total annual consumption of states like New York or exceed the total energy consumption of nation states like the Netherlands or Argentina.