Dr. Conca suggests that while energy independence in the 1970s was the driving force for Sweden moving to hydro and nuclear for electricity production, the carbon tax spurred a significant move from hydrocarbon transportation fuels to biomass while maintaining a strong bulwark against increasing fossil fuel use in all sectors, especially electricity generation. The true difference between Sweden and the U.S. is that we get about 66 per cent of our electricity from fossil fuel while Sweden only gets 3 percent, and that from gas.