From : https://www.sciencemag.org/news/2018/07/ammonia-renewable-fuel-made-sun-air-and-water-could-power-globe-without-carbon https://www.sciencemag.org/news/2

From : https://www.sciencemag.org/news/2018/07/ammonia-renewable-fuel-made-sun-air-and-water-could-power-globe-without-carbon https://www.sciencemag.org/news/2018/07/ammonia-renewable-fu... The emissions add up: Ammonia production consumes about 2% of the world's energy and generates 1% of its CO2. 2% not 20%