You think of Led Zeppelin?
The other part missed in the hype is that hydrogen is a storage medium, not a source of energy. It's a way of transferring the pollution to a single location, but we still need a source to generate the power to strip the H from the O2.
That big fireball you see in the Hindenberg picture is mostly the paint burning. Hydrogen flames are invisible. Firefighters probe for suspected hydrogen flames with a broom to avoid walking right into them.
You think of Led Zepplin I? The humanity.
The Hindenberg didn't explode because of the hydrogen gas, as it turns out. It burned because 2 of the ingredients used in the canvas dope for the outer skin, namely powdered aluminum and iron oxide, seem to be 2 of the 5 major components used in fuel for the space shuttle. The fireball you see in the photo was actually the skin of the airship burning, which was ignited, most likely by lightning. The hydrogen gas burned nearly invisible, well above the structure of the airship.