[a3_nm]

There is in fact already significant industrial use of hydrogen https://en.wikipedia.org/wiki/Hydrogen_production#Use_of_hyd... -- independently from the use case of replacing fossil fuels. So there is already significant demand for hydrogen that could be green, but the vast majority of hydrogen produced today is from fossil fuels.

[credit_guy]

That is true. But the vast majority of the hydrogen produced today is used for things hydrogen was used for decades (fertilizers and oil refining). As such it already has its infrastructure in place, so it's quite a change to migrate to a new way of producing this hydrogen. New uses can demand green hydrogen however.

Germany in particular has a number of green hydrogen producing projects. [1] is a very good source.

[1] https://www.iea.org/reports/hydrogen