) has the largest impact on the CO2 emission from desalination, followed by desalination efficiency (Ewater), pump efficiency (η), the elevation of a city (z), and the others. The four most influential parameters involve the potential energy that brings water to higher heights as follows. 𝐶 . and η is related to the power used to pump up the water. Ewater determines the water volume to pump. z is directly related to the potential energy. Conversely, pipeline construction (𝐶 )