Ammonia, a key part of nitrogen fertilizers, is central to sustaining global food production. However, its manufacture is also energy intensive: Ammonia production requires 2% of global energy to meet global demand. Approximately 170 million metric tons (50%) of the global supply of ammonia is produced by the Haber-Bosch process, a common industrial process. Biological nitrogen fixation produces the other 50% of the global ammonia supply.
