A recent article said that 'the internet' whatever that might mean is responsible for 9% of the world's electricity consumption, or something to that effect.
I don't know whether the author is referring to they mean routers, switches or is also including servers of various sorts as well. It makes you think perhaps they need to park some of that hardware in places where the heat output can actually be useful, serving as a heat source for people, so they can reduce their other heating requirements.
Of course, in the summer this kit is a nightmare because as we all know, it requires cooling then, the required air con eats even more electricity and there is no demand for the heat produced either. So the cure would be to park some kit in cold places, although it would then be in the wrong place, latency would be a problem as well as the cost of the links to the frozen north/south.
But if tech could serve as hearing for half the year then that is surely a win, and whatever that 9% means, saving something like 4% would be important.