On: A hydrogen-powered air taxi flew 523 miles emittin...

[Loughla]

And the energy for that comes from where?

[analog31 → Loughla]

Probably more methane. As mentioned in the neighboring post, hydrogen is an energy storage mechanism, not an energy source. It's also a feedstock for some other chemical processes.

Unless we can tap into some sort of "too cheap to meter but too hard to transport" energy source in the future.

[coryrc → analog31]

I recently learned there are natural hydrogen deposits: https://en.wikipedia.org/wiki/Natural_hydrogen

[analog31 → coryrc]

This isn't shocking, given that there's hydrogen in the atmosphere.

[coryrc → analog31]

I naïvely would have expected that's entirely from chemical reactions like lightning strikes.

[analog31 → coryrc]

Ah good point, I hadn't thought about reactions above ground.