Chemical toxicity is the same as conventional ammonia:

Green ammonia is still chemically NH₃. It is irritating and strongly corrosive/irritating to the respiratory tract, eyes, and skin. Inhaling high concentrations can cause severe respiratory damage or even death. It is also toxic to water bodies (harmful to aquatic organisms). Therefore, safety procedures for handling, transporting, and storing green ammonia are exactly the same as for conventional ammonia and are extremely important.

Green ammonia ≠ harmless ammonia — it is simply ammonia produced with zero-carbon processes.