Further to the concerns expressed by A J Coleman ("We need protection from wind farms", Letters, July 4) , please note that power stations are needed to provide electricity back-up in all wind conditions.

This causes more "spilled" or wasted electricity.

Power stations cannot be minutely adjusted to suit wind variations and this results in back-up so that there is no fossil generation displacement and consequently no emissions saving.

Wind farm operators who claim X thousand tonnes of CO2 savings are being conjectural, and there is no evidence of any saving.

Behind every wind farm there is a power station providing continuous back-up to ensure a stable continuous electricity supply.

This cost is ignored by wind farm interests.

Meanwhile, Scotland's wildlife and scenery are being destroyed at great public and consumer cost.

Public representatives should be representing the public interest instead of greed-driven wind farms.

A R Nelson, Lanark.