It may come as a surprise to people (it certainly was a surprise to me), but actually there was a quite substantial renewable ammonia industry in the past in so

It may come as a surprise to people (it certainly was a surprise to me), but actually there was a quite substantial renewable ammonia industry in the past in some countries, e.g. in Iceland and Norway. It eventually couldn't compete against cheap fossil gas though... See e.g.: https://www.mdpi.com/2673-4079/3/2/11 https://www.mdpi.com/2673-4079/3/2/11