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Since you didn't limit the question to materials found in nature: I've lit wet firewood in the rain using pieces of waxed cardboard. They burn very fast and hot. And wax firestarters are essenti...
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Since you didn't limit the question to materials found in nature: I've lit wet firewood in the rain using pieces of waxed cardboard. They burn very fast and hot. And wax firestarters are essenti...