Server hardware with their 15000rpm fans will do that. We have a customer specializing in GPU intensive number crunching. They have little storage cupboards accessible from the hallway for every two person office. Their workstations sit there and the cables go through the wall to the desks.
Nah, not everywhere. Our village has no water meters because, why. Spring water from the mountains is not treated, only monitored for microorganisms and contaminants and fed into our water supply by gravity. Doesn’t really matter if it runs through a computer on its way to the sea or not.
In places like big cities or flat plains where the water needs to be pumped and treated that’s a different thing.
Air cooling is just better (usenet.lol)
Air is better than water