This analysis from the UK Royal Society injects some realism into the hype about hydrogen as an aviation fuel: https://royalsociety.org/-/media/policy/projects/net-zero-aviation/net-zero-aviation-fuels-policy-briefing.pdf

Yes, it's good do see some shifts in public awareness and corporate behaviour. But it's nowhere near enough. Most people in affluent nations seem quite happy to keep flying, driving and consuming; and politicians seen quite willing to keep greenwashing and deflecting blame. The only hope IMO is to persuade more humans that their kids' survival depends on all of us adopting a lower impact lifestyle.

https://www.nature.com/articles/s41586-023-06083-8

“Humans are taking colossal risks with the future of civilization and everything that lives on Earth, a new study published in the journal Nature shows. Developed by an international science commission engaging more than 40 researchers from across the globe, the scientists deliver the first quantification of safe and just Earth system boundaries on a global and local level for several biophysical processes and systems that regulate the state of the Earth system.”