I expect commercial aircraft to remain hydrocarbon fueled for the foreseeable future. But jet fuel is only 11% of American transport fuel demand: http://www.eia

I expect commercial aircraft to remain hydrocarbon fueled for the foreseeable future. But jet fuel is only 11% of American transport fuel demand: http://www.eia.gov/energyexplained/?page=us_energy_transportation http://www.eia.gov/energyexplained/?page=us_energy_transport... (Meaning less than 8% of all American petroleum consumption, given the other poster's 70% figure.)