From Sean P
Helen Knight’s feature discussed generating energy from ocean heat (1 March, p 48). I wonder, with all the holes being drilled for fracking (15 February, p 36), is there any opportunity to tap into geothermal energy either during or after fracking operations? The sort of depths being drilled lead me to believe there would be a significant thermal gradient capable of generating quite a lot of power long after the gas has been extracted.
If there were a renewable power source that could be harvested relatively cheaply after the initial gas extraction, it might well appease anti-fracking groups.
Chard, Somerset, UK
. Crossman
