I WELCOME Tom Cooper’s comment (HAS, Nov 8) on my letter of November 1 about fracking.

He worries about earthquakes. The evidence from the Blackpool area shows that the earthquakes there stopped once the fracking experiments ceased.

The fracking zones are far below the water table. If the boreholes are properly sealed then ground methane is more likely to be from biological matter or coal far above the shale being fracked.

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I don’t understand the rationale behind the ‘green’ subsidies either. John Aspinal (HAS, Nov 8) criticises the use of wood pellets, I too would like to see an audited carbon dioxide balance sheet for this process compared to locally produced coal.

Anthony J. Foster, Peterlee