How does the environment behaves with exhaust gas in vehicles, if their temp is being reduced before exhaust? If the exhaust gas passes through a similar setup to that of the radiator, and then if it gets exhausted, with a lower temperature, the heat will be less and exhaust gas temp should be less and the water vapor effect may differ. probably with some design change this can be achieved, this link the windmill one some what relates to what i am saying https://science.howstuffworks.com/environmental/earth/geophysics/manufacture-water1.htm This is more of an subject that is related to evaporation and fractional distillation. Where the liquids of different temperature, losses heat or based on temperature they gets settled in the columns. Given that, apart from sea, rivers, the major presence of water is combustion, where it is present as water vapor in exhaust gas. Unlike the other experiments,where raw materials like hydrogen, oxygen will be used to form the cloud,