Fracking: The Big Questions - Anti-fracking protests

Fracking: The Big Questions. If there's one thing we know for certain about the issue of Fracking - it's that any drilling for shale gas in the North West will be met with noisy and angry protests.
Anti-fracking activists say the technique of drilling for natural gas underground is a threat to the environment and public health.
BBC Radio Merseyside's Mat Trewern explores some of the concerns over fracking and why some people are so passionately opposed to it....