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Part of the EU plan is to force a 1% blend of this in all jet fuel sold in the EU and slowly ratchet up the percentage over time.

yep gas is like 100 times more energy dense as lithium ion iirc so there's cases where it's just a better "battery". there's also a big carbon cost to replacing all the huge number of gas engines we have. so like what HIF Global wants to do using electricity to make gas can be a good solution.

$8 per US gallon (3.8 L), not imperial gallon.

Thanks for the correction. I missed that.

There is lots of research in this area, along with renewable jet fuels, hydrogen, and electric powered jets.