Hydrogen-powered planes on the way

Boeing tests first hydroge-powered plane and Hydrogen powered plane takes off are a few of the many headlines written in the last 24 hours about Boeing's first successful flight of a human-piloted, hydrogen-powered aircraft. I was one of about 30 journalists at the press conference held at the Ocaña airfield near Madrid in Spain, where the announcement was made.
Boeing's spin machine was definitely laying on the eco-credentials thick and fast, wheeling out John Tracy, Boeing's Chief Technology Officer, to hammer the message home. He told the BBC it was "a historical technological success… full of promises for a greener future".
Well, yes, and no. And from where I was sitting, the future didn’t seem quite so mint-tinted.For a start, the wind was blowing in the wrong direction, a factor the experimental aircraft could not handle, meaning the demo flight had to be cancelled.