The John Muir Trust (JMT) has released new figures which show that the energy output of the country’s wind developments has been much less than expected. Output from wind turbines is generally stated to be 30 per cent. But figures provided by analyst Stuart Young, who runs Caithness Wind Information Forum which campaigns against the spread of windfarms in that area, show that for 80 per cent of the time between February and June 2010 Scotland’s turbines were operating at less than this. For almost a third of that time they were producing virtually no energy, operating at less than…