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A comment on Hydrogen fuel cell cars (2020). Parent comment

Re:Hydrogen fuel cell cars (2020) by boringg on Monday July 05, 2021 @02:29PM (#27740625)
Surely there is a tracer chemical that could work.
[ Parent | on HN ]
Re:Hydrogen fuel cell cars (2020) by HPsquared on Tuesday July 06, 2021 @05:29AM (#27745973)
The usual ones are sulfur based.
[ Parent | on HN ]