That is super inefficient, and while it was an industry based on hydropower using the Birkeland-Eyde process before 1910, those factories switched to Haber-Bosc

That is super inefficient, and while it was an industry based on hydropower using the Birkeland-Eyde process before 1910, those factories switched to Haber-Bosch using hydrogen made with electrolysis and electricity from hydropower instead from 1927.