On 1/7/07, Peter P. wrote: > Russell McMahon paradise.net.nz> writes: > > It's not that it's *fossil* energy per se that neds inputting - it's > > the fact (apparently) that overall the net process loses energy. If > I keep wondering why the powers that be insist in calculating the energy > output > of biofuels with 'fossil energy input'. Obviously the production of a > biofuel > would strive to use NO fossil energy. Therefore the energy input must be > calculated in biofuel energy input (as in wood, peat, solar etc). I'm not a chem engineer, but a friend that /is/ tells me fossil fuels require four times the yield of energy to recover it from the earth and process it. I don't understand why this argument is given against biofuels... Tsu -- There's no .sig like the present -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist