Heat networks provide economies of scale for existing clean-heat technologies and provide markets for surplusheat from industry, biomass CHP and energy from waste.
But beyond these and a few other heat sinks, climate science cannot account for about half of the surplusheat believed to have accumulated on Earth in recent years.
The waste heat is converted into cooling capacity, and the small heatsurplus is dumped into aquifers 300 m below ground level, where it is stored and recovered in winter.