"Which is a problem considering how small the H2 molecule is: we can't reuse our existing LNG pipelines." Assuming you mean natural gas pipelines, this isn't t

"Which is a problem considering how small the H2 molecule is: we can't reuse our existing LNG pipelines." Assuming you mean natural gas pipelines, this isn't the case everywhere. Many flexible seals and ancillary equipment will need to be replaced but most low yield strength pipelines like the ones commonly used in Europe are easily adapted to H2 use. The American network use more high yield strength steel which is less suitable to hydrogen service.