The cost of converting council housing stock in Swansea so that it hardly emits any greenhouse gases could be an eye-watering £750 million.
Swansea has around 13,600 council houses and flats and has spent more than £500 million on them over the last few years - refitting kitchens, bathrooms, wiring and windows, and upgrading roofs.
That project was aimed at complying with the nationwide Welsh Quality Housing Standard, but now the Welsh Government wants councils and social housing landlords to upgrade their stock further so that powering them emits virtually no greenhouse gas emissions.
