Nothing magical about running H2 through piping. It is done on a daily basis in refineries in the Reformer units and Hydrodesulferization units. Be careful at flanged connections for H2 leakage. Hyrogen flame is invisible and you definitely don’t want to walk through one.
“Green” was in the article. Trigger word for FReepers causing all logic and reasoning to be discarded in favor of ignorant comments and crude jokes.