Central heating is the distribution of hot water from a central location. Best case it’s leftover energy from nearby industry, worst case it’s just a place wher

Central heating is the distribution of hot water from a central location. Best case it’s leftover energy from nearby industry, worst case it’s just a place where something is burned, such as biogas/biomass/trash or fossil fuels. But many cities have some heavy industry that can supply waste heat for a lot of buildings. Centrally burned fossil is better for the environment than burning in residential buildings, especially in cities. For the climate it makes no difference though. Even though it’s a waste of high grade energy, one could imagine powering heating plants with electricity in a pinch. If there is so much surplus electricity that reactors are closed then perhaps… The Stockholm City gas system, although much smaller than Berlin’s was swapped to a renewable gas (biogas) 10 years ago.