From New York City to rural Cornwall, communal heat pump networks could be the answer to decarbonising heat in both city high-rises and other hard-to-heat homes.
So great idea in theory to use heat pumps to heat in winter and cool in summer and therefore would even be putting the heat back that you take out.
Do note that you have to insulate well first - and that is not something that is exactly happening with any alacrity at present.
I did notice the line about all the years of sunshine it had taken to warm the earth and was then thinking, so is it a good idea to remove it? Will trees with deep roots suffer if the ground gets a lot colder? Could something else go wrong?