"The 1.3 percent was obtain by reducing the energy produced (1.4 quads) by a third, or to .91 quads and then multiplying .91 quads by the energy efficiency of t

"The 1.3 percent was obtain by reducing the energy produced (1.4 quads) by a third, or to .91 quads and then multiplying .91 quads by the energy efficiency of the human body, 15 percent, which gives .137 quads, the amount of energy extracted from food. The .137 quads is then divided by the total energy that goes into food production, 10.4 quads." This is the crux of his bad argument. Not going to waste my time proving why its wrong. Maybe someone else feels up to it.