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Hydrogen-powered planes almost ready for takeoff
(arstechnica.com)
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this post was submitted on 10 Aug 2023
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Hydrogen is an energy storage, like a battery, so of course it requires a lot of energy to produce, that's the energy that you get back when consuming it (minus inefficiency losses of course).
The advantage of hydrogen over fossil fuels is that it can be produced from renewable energy, while fossil fuels cannot.