Do you mean green like in pink unicorns or like in red herrings?

I see. As in both.

How Germany’s Hydrogen Boom Stalled – Green hydrogen has the potential to heat millions of homes and keep German industry humming. So far, though, a lack of the environmentally friendly gas and the infrastructure needed to transport it have prevented its wide-scale use.

Welcome to the sobering hydrogen reality. While Germany hopes that it will soon be able to run basement gas heating systems on hydrogen, steel manufacturers are converting their production to the green gas at a cost of billions and energy companies are planning new power plants that will generate electricity from hydrogen, almost everything needed to make the climate-neutral dreams a reality in the near future is still lacking. The environmentally friendly hydrogen is missing, as are the pipeline networks to carry it across the country, not to mention reliable business models.