A little known survival aid is the Dakota Fire Hole. It is easy to construct & has many advantages. It  is initially more labor intensive than simply building a surface fire, however the outlay in energy required to make a Dakota fire hole is more than offset by its efficient consumption of fuel; it greatly reduces the amount of firewood required to cook meals, treat water to destroy pathogens, or warm your body.  It creates a stable platform that's convenient to cook over & is easy to…
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