Unfortunatelly for those of us who like to travel, there is not an alternative to fossil fuels to power commercial air fare. We might get solar, battery, or LP powered autos, but I am not familiar with any alternative to jet fuel that is even being explored. Overseas travel might soon be priced out of reach of the Average american because of rising fuel prices. Heck, as I check the current air fares to my favorite locations on line, I might already be priced out!