Huh, was most surprised by: "water cooling can reduce data center energy use by approximately 10% compared to air cooling".

I know some ICE engines and mammals are air cooled (older VWs; canines) - and have never seen any numbers on this - but really would have expected the efficiency to be much greater, in like the 30-50% range. Granted this isn't an exhaustive dataset and possibly hand-picked by the authors/org but looking forward to explore this more.