Some time ago I published a book on sidewise time/dimension travel based on the backstory of Road to Armageddon ... and did a fair bit of research on
Food-Energy-Raw Materials-Transport which may be of interest/use.
I have just run up a PDF of the relevant chapter which you can download from ...
https://www.dropbox.com/s/51m611x40b...ample.pdf?dl=0
... if you're
really interested, the whole book, 'Displaced' is available on RPGNow (see 'Phalanx Games Design').
Phil