Make a $4 Emergency Biomass Stove From Concrete Blocks

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 In the aftermath of a disaster, purifying drinking water will be a priority. The quickest, safest method could be boiling. This biomass stove only requires four concrete blocks, a tin can with both ends cut out and a gas stove eyelet top. The completed stove is sturdy enough to hold a several-gallon container of water, stew or a heavy cast iron Dutch oven.

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