Water management innovation is central to the future of ICs
eetimes.com
eetimes.com
The other thing seems to be that water is used for cleaning, which means it ends up containing toxins. That seems to be a much harder problem to solve since you need to filter/destroy/neutralise the toxins?
“Why it’s (almost) impossible to cool the tube” https://youtu.be/hQo6_GkITe0
Quite informative.
At least with above ground water probably easier to dispel the heat .
They also have issues in desalination plants of pumping the resulting salty brine back.