Scotsman: MADE from girders no more. Irn-Bru, the iconic fizzy drink imbibed by generations of Scots, will now be manufactured by soft Atlantic breezes. Owners AG Barr are turning production of the orange-coloured drink green by harnessing the power of the prevailing westerly winds. The company has just received planning permission to erect a £2.5 million turbine to provide most of the electricityADVERTISEMENT from wind power at its Cumbernauld factory. The massive two megawatt …