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I found this PDF from UNESCO It would seem ethanol (denatured alcohol) is top of the list, but petrol is pretty good and probably more cost-effective. The both have similar densities (about 0.7 kg...
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I found this PDF from UNESCO It would seem ethanol (denatured alcohol) is top of the list, but petrol is pretty good and probably more cost-effective. The both have similar densities (about 0.7 kg...