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by simpleTruth
5538 days ago
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Except coal cost's ~1/10th what refined Oil does. 1 short ton (907kg) of coal costs $71.25 as of October 2010 coal has an energy density around ~32.5 (MJ/kg). 907kg * (32.5MJ / kg ) / $71.25 = 413 MJ per $. Compared to gas at ~3$ / gallon. So, 121 MJ / gallon / (3$ / gallon = 40 MJ per $. |
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