Producing and liquefying 27 million tons of hydrogen per year to power clean aviation would require 1.3 trillion liters of water

To produce 27 million tons of hydrogen, a significant amount of water is required. Throughout this wiki, we have measured the water demand for green hydrogen production by establishing a baseline estimate of how many liters of water are required to produce one kilogram of green hydrogen. On average, it takes 47 liters of water to produce 1 kilogram of hydrogen. Using this benchmark, to determine how many liters of water is required we first need to convert the 27 million tons to kilograms. Since 1 ton is equal to 1,000 kilograms, 27 million tons is equivalent to 27 billion kilograms. Multiplying these 27 billion kilograms by 47 liters of water per kilogram of hydrogen, we find that approximately 1.269 trillion liters of water are needed. This means that to produce the necessary hydrogen to replace all jet fuel used in the United States, we would require about 1.269 trillion liters of water. 1.3 trillion liters of water is equivalent to around 1% of total water use in the United States.