On a bright but bitterly freezing day last December, I drove to the Cavan-Monaghan county border to visit Taghart wind farm. The night before, in nearby Co Meath, the turbines in the development had produced some of the electricity used to charge my little electric car. It was now being depleted at an alarming rate as I skidded up the snowy hills. Taghart was in operation for just one month at the time, Statkraft engineer Ronan McGowan told me. He allowed me into the base of one of the turbines’ 17-storey-high towers, where a vertiginous lift was waiting to carry…