As someone who is distincty green-tinged (not Colonial Defence Force) I don't see the problem with shale gas. Burning it still produces CO2, but a hell of a lot less than burning coal in a power station. Nuclear would be a still better option, but with long lead times and a lack of political will we need something in the interim. Even better, we don't have to get into bed with dodgy regimes (or be blackmailed by them) for our gas.
The whole fracking argument is a bit of a diversion, we've been setting off explosions underground for a long time, without causing major earthquakes or ground water contamination - it was called mining. I think the problem may lie in the name, a cross between fucking and cracking can't sound good!
