Looking at the chart, one can see that canned foods,for instance, need to be kept at a rather moderate temperature. (See fig 6 to the right). The Ardians, (assuming that there is no electricity or refrigerators) will have to be creative in their approach to storing the food. Possibilities could include keeping the closed cans in a lake or river with appropriate temperature. These challenges can certainly be overcome in time, however, and the Ardians should enjoy preserved food that is safe and tasty.
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Fig 6: The Ideal Temperatures for food preservation