This would have been my explanation too, but to my surprise, wood is only about 1/3 of the energy density of diesel fuel. I'm not sure why i expected it to be a

This would have been my explanation too, but to my surprise, wood is only about 1/3 of the energy density of diesel fuel. I'm not sure why i expected it to be an order of magnitude difference. https://en.wikipedia.org/wiki/Energy_density#Energy_densities_of_common_energy_storage_materials https://en.wikipedia.org/wiki/Energy_density#Energy_densitie...