For cooling you can also use a heat exchanger and dump it into a river or an ocean or so.

Closed loop heat exchange costs more electricity. It's not a free lunch that data center designers are overlooking.

	▲	yxhuvud 3 hours ago \| parent [-]
		That is of course true, but it is at least not a totally unreasonable practice, unlike using fresh water straight off the grid as a cooling source.