I was replying to Exsumper (apologies to other Alexes)
Like many controversial subjects, there are lots of scare stories out there about risks from fracking, for example reports that fracking could trigger a Mendip volcano (
http://www.thisissomerset.co.uk/sitting-Mendip-volcano-says-Somerset-expert/story-14010082-detail/story.html#axzz2SY3obpBC) but many of these stories are not substantiated by the evidence. Mendip is not about to erupt! Similarly, much has been made of the Lancashire earthquakes, but the UK gets an average of 15 magnitude-2.3 earthquakes every year, so the quakes produced by the fracking are not out of the ordinary (the magnitude-5.2 Market Rasen earthquake in 2002 which woke me up in the middle of the night was far larger)
I am not pro-fracking, but equally I don't take as read much of the stuff written about it in the media or on various websites, same as I don't believe everything I read in the Daily Mail, or for that matter any other newspaper. Personally I would rather we didn't have to use shale gas, not least because of the CO2 emissions, but if we do, then clearly it needs to be well regulated with appropriate controls, safeguards and monitoring on well casing, injections, groundwater and seismicity.
As Graham rightly points out, we need a mix of energy souces, coupled with a fully integrated international grid to cope with fluctuations in demand and supply.
But the more renewable power we can generate the better - fracking may harm the environment, but a rapidly warming global climate will do far worse.
For info, the last 24 (calm) hours wind produced 3.2% of the UK electricity (in Spain, they were producing about 25% of their demand, in Denmark, c. 7%, Norway about 3.6% with 48% hydro).
But as Dunc points out, energy efficiency is the best method. Most of us (those in listed buildings in National Parks are a possible exemption) can do this easily and it will save you money.
Andy