IN my previous letter (HAS, Sept 8), I quoted a number of facts about wind energy.

Unfortunately, they have been misread by Derek Thornton (HAS, Sept 13).

Using the Government’s figure of 0.21 for the utilisation factor, 165MW of rated capacity will produce 305,534 MWh of electricity over a year. This is enough to supply 63,236 average homes.

This is 28.8 per cent of the homes in County Durham.

Gas and coal power stations are the most flexible form of electricity production and their output can be varied according to the wind level. This results in a direct saving of 159,962 tonnes of CO2 in County Durham alone.

Ben Johnson, Daddry Shield.