There was this underwater datacenter https://www.bbc.com/news/technology-54146718 see also here: https://natick.research.microsoft.com/
Oceans are insanely large (citation needed) heat sinks.
If my math is right (hopefully), and assuming there's no cooling (hopefully not), it would take 790 billion years for Microsoft's datacenter to raise the temperature of the ocean by 1 degree.
(1.426e21 kg * 4184 J/kg) / (240000 J/s * 31536000 s/yr)
https://web.archive.org/web/20180223071740/https://blogs.ora...
"Thus, fully populating a 128-bit storage pool would, literally, require more energy than boiling the oceans."
- straight from the horse's mouth (that's Jeff Bonwick, who created ZFS).
Sea surface temps are in the environmentalist spotlight at the moment. Between when Microsoft started their pilot program in 2018 and now, surface temps have changed dramatically. Some experts believe this change has made storms more energetic and less predictable.
Salt-water cooled power plants along with desalination plants have been getting pushback from environmentalists for years because of the negative effects of their heated effluent. This will only intensify.
For Microsoft, public relations have a documented cost. My claim is that their PR team would say that right now the cost of a large phase II deployment would outweigh the savings.
What's the deal with district energy? [2023-10-07] https://www.volts.wtf/p/whats-the-deal-with-district-energy
TIL: There's already 1,000s (?) of heating & cooling districts in North America. The number of buildings added is increasing 5% annually.