Hydrogen balloons shouldn't be pressurized, the last thing you want is more mass in the same volume, that would make it less buoyant. Hydrogen doesn't explode,

Hydrogen balloons shouldn't be pressurized, the last thing you want is more mass in the same volume, that would make it less buoyant. Hydrogen doesn't explode, it's only Hydrogen + Oxygen mixtures that can explode, so an airship with intact gasbags regularly checked to contain pure Hydrogen can be at very low risk of sudden explosion. Hydrogen is allowed in airoplanes to propel them forwards[1], why not in airships to propel them upwards as well? > "In the event of a fuel leak you can stop a car within seconds and evacuate, that isn't possible with a flying device" Have you read the details of the Hindenburg disaster? If not, would you be surprised to learn that most of the people on board survived?[2] Compare with Wikipedia's list of commercial aircraft disasters[3] and the survival rate of those. And the sheer quantity of accidents, for that matter. (And Hydrogen in airships isn't a fuel, and it can be vented out of the top of the bags far away from the people in the gondola below, and anyway leaking Hydrogen goes upwards and away). [1] https://www.bbc.com/future/article/20210401-the-worlds-first-commercial-hydrogen-plane https://www.bbc.com/future/article/20210401-the-worlds-first... [2] https://en.wikipedia.org/wiki/Hindenburg_disaster https://en.wikipedia.org/wiki/Hindenburg_disaster [3] https://en.wikipedia.org/wiki/List_of_accidents_and_incidents_involving_commercial_aircraft https://en.wikipedia.org/wiki/List_of_accidents_and_incident...