Reflecting on Fracking?

There has been some suggestions that even 'greens' (environmentalists) must learn to love the contributions that gas extracted from shales by 'fracking' can make to affordable and 'clean' UK energy production (http://www.guardian.co.uk/commentisfree/2013/mar/15/fracking-monster-greens-must-embrace?INTCMP=SRCH). Having said that, others (http://www.guardian.co.uk/environment/2013/mar/14/environmental-realities-fracking?INTCMP=SRCH) have noted that the process does result in contaminated waters that have to be disposed of (if it can all be collected) and that shale bores to do not produce gas for very long (necessitating repeated bores). I am really not sure that this technology has a place on a relatively small and crowded island.