[philipkglass]

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_transport...

(Meaning less than 8% of all American petroleum consumption, given the other poster's 70% figure.)

[officelineback]

To me, 11% of all transport fuel demand is a lot! I wonder what the balance is for trains, long haul trucks, are diesel delivery trucks in general are.