Half a croissant, on a plate, with a sign in front of it saying '50c'
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Getting blown into traffic is never fun.

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Greener Charcoal Production

And somewhat more efficient too
 
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Start with a normal home-made charcoal maker (a sealed oil barrel with a fire underneath and a pipe leading from the top to the fire).

Then stick in a home-made jet turbine (basically a car turbocharger) to run off the gases and power a generator.

Then put a catalytic converter in the exhaust to clean them up. Use the cat and remaining exhaust temp to heat up the bottom of the barrel.

marklar, May 21 2011

garden waste pyrolysis
[xaviergisz, May 22 2011]

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       ... then draw the whole thing using a charcoal stick
xenzag, May 22 2011
  
      
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