From what I remember, the impact was pretty minimal. Water has a huge capacity for heat so the temperature was elevated only when very close to the data center.
We used to say that about plastics in the ocean. And landfills. And light pollution. And noise pollution. And space junk. And on and on and on.
Heck, not that many decades ago there were responsible people who thought that air pollution was no big deal because there's plenty of air, and it's just fine if California allows rich car collectors to keep buying leaded gasoline long after other states outlawed it. The impact is "minimal."
I used this calculator https://www.omnicalculator.com/physics/specific-heat
The worry is not that that the average temperature of the oceans will rise. The worry is that the local temperature of the ocean will rise. This is exactly what happens with other forms of thermal pollution. One example studied for decades was California's San Onofre nuclear power generating station. It has been subject to regulations regarding its thermal pollution into the ocean. They built long pipes so that the temperature increase from the cooling water could heat the ocean gradually over a wide area rather than severely in a narrow area. It's the same principle as a CPU heatsink.
https://en.wikipedia.org/wiki/Thermal_pollution
https://authors.library.caltech.edu/26008/
https://www.worldcat.org/title/ecological-effects-of-thermal...
For what it's worth, I personally found your comment quite distasteful. Instead of trying to understand what you didn't know, you knocked down a straw man and pretended like it was obvious and backed by science.
But that wasn't really the option now, was it?
Reference: >>>
If 64 bits isn't enough, the next logical step is 128 bits. That's enough to survive Moore's Law until I'm dead, and after that, it's not my problem. But it does raise the question: what are the theoretical limits to storage capacity?
Although we'd all like Moore's Law to continue forever, quantum mechanics imposes some fundamental limits on the computation rate and information capacity of any physical device. In particular, it has been shown that 1 kilogram of matter confined to 1 liter of space can perform at most 1051 operations per second on at most 1031 bits of information [see Seth Lloyd, "Ultimate physical limits to computation." Nature 406, 1047-1054 (2000)]. A fully-populated 128-bit storage pool would contain 2128 blocks = 2137 bytes = 2140 bits; therefore the minimum mass required to hold the bits would be (2140 bits) / (1031 bits/kg) = 136 billion kg.
That's a lot of gear.
To operate at the 1031 bits/kg limit, however, the entire mass of the computer must be in the form of pure energy. By E=mc2, the rest energy of 136 billion kg is 1.2x1028 J. The mass of the oceans is about 1.4x1021 kg. It takes about 4,000 J to raise the temperature of 1 kg of water by 1 degree Celcius, and thus about 400,000 J to heat 1 kg of water from freezing to boiling. The latent heat of vaporization adds another 2 million J/kg. Thus the energy required to boil the oceans is about 2.4x106 J/kg \* 1.4x1021 kg = 3.4x1027 J. Thus, fully populating a 128-bit storage pool would, literally, require more energy than boiling the oceans.