The Seven Levels of Aviation (not for the humor-impaired)

dihydrogen monoxide, actually.

Hydrogen hydroxide, actually, if one counts the way the molecule splits.


I believe that you are right, but something akin to dihydrogen-monoxide or
possibly dihydrogen-oxide was the name used to perpetrate an amusing prank
in which a city council allegedly voted to ban any use or possession of the
substance in their city. As the story was related to me: the perpetrators
supposedly admitted the prank and the council then withdrew allegedly
withdrew the ordinance before final passage.

Now, if we can only get the perpetrators of the global warming prank to
confess...