Datacenter cooling uses so much water because it is
"evaporative cooling"-- it is actually boiling water. transition water to steam takes energy-- energy from the machines.
This can use up alot of fresh water (it is), or...
it could desalinate water at a huge scale. boiling seawater allows fresh water to be separated from salt.
so we could have datacenters boil seawater to create fresh water to water plants.
why not? (am I wrong about this?)
1/2