The Haber-Bosch process is the primary method in producing ammonia from nitrogen and hydrogen. Ammonia produced, utilized mainly as fertilizers, currently responsible for approximately 1.8% of carbon dioxide global emissions
Yes, green ammonia is a thing - not yet at scale but there are plans afoot, funded by resource billionaires, to make industrial ammonia w/out the greenhouse gas ommissions.
https://fortescue.com/what-we-do/green-energy-research/green...