keep in mind there are all kinds of things you can eat (just watch Man Vs. Wild or Survivorman to see what I mean) that people dont think of normally - I am betting that a lot of starving people would walk right by things that they dont know are edible
for instance cattails are very very common here in the US - and you get more edible starch from them then you do potatoes - and have eaten them myself
another is burdocks - we used to eat them all the time - to most its a weed but in western NY you can find lots of people eating them
and dandelions make one very good salad
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