Falling energy prices? Bills going down? A glut of cheap, natural gas less dirty than coal so less costly in terms of cash and carbon? An American dream?
That's the promise that some make looking at the experience of the US where shale gas, that in simple terms is blasted out the ground using water and chemicals in a process called 'fracking', has turned the energy market upside down.
Electricity and gas prices have been pushed down dramatically - they've sunk to the lowest level in ten years across the Atlantic.