> Are artificial fuels (i.e. hydrogen or something we can make from hydrogen) There is no difference between a synthesized fuel and one pumped from the group -

> Are artificial fuels (i.e. hydrogen or something we can make from hydrogen) There is no difference between a synthesized fuel and one pumped from the group - it's the same molecules. What matters is your energy source to make the synthesized fuel. In any case hydrogen is a particularly bad fuel for airplanes. The best fuel is actually the one we already use.