recycling the heat from AI data centers

I’d say the govts should make it mandatory for anyone making a large enough data centre, to create a heat transfer infrastructure to nearby localities. The locals can then buy hot water (metered) via pipelines from the local govt and that can go towards paying for the power extension tax that the data centre has to pay.
Oh yes, there needs to be a power extension tax first, which is levied on anyone using data centres for wasteful stuff like AI, Crypto-mining etc.