Comment Re:Synthetic fuels (Score 1) 363
I agree most synthetic fuels are not exactly energy efficient. In places like Brazil they make ethanol from sugar cane and power many of their cars that way, and there are some in the U.S. that fuel appropriately adjusted automobiles with 85% ethanol from corn. And both could work, but they are generally less economical than ordinary gasoline, at least around here. There is also synthetic gas that is produced from coal, sometimes known as syngas, which can be (and has been) used to power furnances for (residential) heating applications but which would not make a good car fuel for much the same reason methane does not - not enough energy density even when liquified. And pure hydrogen, though cleaner in carbon terms, is worse, for reasons that are well understood - like being prone to leaks.