“Fossil fuel accounts for 30 to 80 percent of the load in convoys into Afghanistan, bringing costs as well as risk. While the military buys gas for just over $1 a gallon, getting that gallon to some forward operating bases costs $400.”
Amory Lovins of course has been writing on the topic of weaning ourselves off imported fossil fuels since at least 2004, a slightly different topic, but of interest to the Pentagon, obviously.
(From 2004) “A 329-page report out this week from the Rocky Mountain Institute, a Colorado think tank—funded jointly with the US Defense Department—suggests ways the US could phase out oil imports by 2040 and wean itself off oil altogether by 2050. “Winning the Oil Endgame” claims that Americans could halve oil use through efficiency, and then substitute competitive biofuels—based on the conversion of wood into ethanol—and saved natural gas for the rest.”