Tom in NO brings up another great point.
Natural Gas (either compressed or liquified) could be used some how.
Many newer vehicles, particularly public transit buses are powered by Compressed Natural Gas (CNG
) or Liquified Natural Gas (LNG).
Internal combustion engines have become quite versatile and like I mentioned earlier, they have developed fuels from vegetable waste that could be burned by internal combustion engines.
At a few gas stations around the country, you can buy a fuel made of corn that can be used in diesel engines. When that fuel is burned and comes out the exhaust, it smells like french fries.
Anyways, that's besides the point.
While it's true that internal combustion engines and gas turbines (jet engines) are completely different. They do share some similar concepts.
The most obvious one is both involve the combustion (burning) of fuel.
If alternative fuels have been developed for internal combustion engines. Alternative fuels can be developped for jet engines eventually.
Perhaps the biggest problem however is cost and fuel economy.
Natural Gas for example is expensive, and the engines themselves are expensive and are expensive to maintain. Also, since Natural Gas is a very light gas, it's burned very quickly, a lot quicker than petroluem.
So the result will be decreased range versus a petrol powered vehicle.
As with all new technologies, there are hurdles. But they'll eventually be worked out.
"Generosity is giving more than you can, and pride is taking less than you need." - Khalil Gibran