Re: Hydrogen
Reminds me of a tour I was given of the about-to-be-opened Department of Materials Science and Metallurgy at Cambridge. One of the issues was the safety of the lab for the group which researched semi-conductor materials. Some of the processing chemicals can be ... interesting.
"Never mind" says the architect "we've got a checklist for that. Now then: which processing chemicals do you use?"
Academics: "All of them. And we are in the business of inventing new ones."
Architect: "Ah. That isn't an option on our checklist."
In the end, the lab was put on the top floor with a light roof, so that any explosions could just blow the roof off.
Biting the hand that feeds IT
