Hydrogen Gains Renewed Interest, But Challenges Remain

fuel-cell-powered airliner
NASA-funded Cheeta center is studying technology for a full-size fuel-cell-powered airliner.
Credit: University of Illinois Urbana-Champaign
Periodically, hydrogen rises to the surface as a way to reduce aviation emissions only to sink under the weight of challenges in using the high-energy, but low-density, fuel in aircraft. But interest in hydrogen is enjoying a resurgence as part of wider efforts to combat climate change. Report sees...

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