Where water filled, abandoned underground coal mines occur, it is possible to use this water as a source from which to recover low carbon, secure heat and distribute via heat networks.
Pan geir pyllau glo tanddaearol segur, wedi’u llenwi â dŵr, mae’n bosibl defnyddio’r dŵr hwn fel ffynhonnell wres ddiogel carbon isel, i’w dosbarthu drwy rwydweithiau gwres.