Fracking: The big questions. What's involved?

Available for over a year

All this week on BBC Radio Merseyside we're taking a closer look at the highly controversial subject of fracking or drilling for natural gas which is trapped underground. With Cuadrilla and IGas exploring for shale gas in the North West, most of us have heard of fracking - but how many of us really understand exactly what it involves? In the latest in his series of reports, BBC Radio Merseyside's Mat Trewern explains everything you need to know: