[thackney]

one unit of liquid energy (petroleum),
yields ten units of liquid energy in the firm of ethanol.

It takes a lot more than petroleum to produce ethanol. See post #17

[riored]

do you understand the difference between
‘energy’ and ‘liquid energy’ ?
(apparently not, so here it is.)

liquid energy —> petroleum
‘energy’ your use —> coal, natural gas, petroleum

most of the energy comes from the US,
only one tenth comes from petroleum

this is from Argonne national lab, I
direct your attention to the right part of the
top graph on page two
http://www.ncga.com/public_policy/PDF/03_28_05ArgonneNatlLabEthanolStudy.pdf