Hydrogen fuel could revolutionize airlines - Los Angeles Times

[Check Airman]

Originally Posted by ericoides

Whatever they come up with, as well as being carbon neutral, it must satisfy two criteria:

1. No, or little, noise.
2. No contrails, such as currently disfigure our skies like some sort of careless straight-line graffiti.

I can’t tell if this is serious or satire.