The world’s largest particle accelerator now has an important new mission: heating thousands of homes. The Large Hadron Collider at CERN has begun to funnel the waste heat from its cooling system to a new residential and commercial area in the nearby French town of Ferney-Voltaire, with the new linkup expected to be able to heat several thousand homes at once.
Datacenter heat is actually a very good source for local heating networks and a lot of European countries either already mandate to consider it when feasible, have introduced legislation that will make it mandatory over the next years or are at least supporting it financially.
It’s actually fairly common to do so for a long time here - from waste incineration, steel mils, nuclear plants, etc.
Personally I heat my office from my server rack and my old job did heat one of their office buildings from the heat generated by the data center in the basement. (And funny enough also did partially cool it from that source)