Chemistry · Industrial Applications of Ammonia

Consider the following applications in industrial and commercial processes: I. Production of nitrogenous fertilisers, particularly in the synthesis of urea and ammonium-based fertilisers. II. Refrigeration systems used in large-scale cold storage facilities and ice plants. III. Manufacturing of high-density polyethylene (HDPE) used for plastic containers and bottles. IV. Cleaning formulations used for removing grease, oil, and stains from glass and hard surfaces. In how many of the above processes is ammonia typically used?