The chemical composition of green ammonia is the same as that of conventional ammonia-based fertilizers (such as anhydrous ammonia, ammonium nitrate, and urea, all of which are made from ammonia). However, its production process uses renewable energy and green hydrogen, which significantly reduces CO₂ emissions during manufacturing. In other words, "green ammonia fertilizers" refer to ammonia-based fertilizers produced with zero-carbon ammonia.

Significance: They can help agriculture reduce emissions from the upstream supply side. (However, issues such as nitrogen loss and N₂O emissions during field application still require proper management.)