101 Ways to MAKE FIRE - #7 The Devil’s Breath
The process of making it is very simple and can be observed along many rural roads in the developing world. A stack of wood is set alight, but is covered with a mound of earth. In the absence of air, we get something called incomplete combustion. The wood cannot burn. Instead it chars. Normally, when you burn wood, all the carbohydrates combine with oxygen to form carbon dioxide and water vapour. All that is left is the fine ash resulting from the small amount of minerals in the wood. (This …
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By N2H