Today, there are nearly 1.5 GW of offshore installed capacity in Europe. The sector has evolved enormously in a decade and provided it gets enough R&D financing, and that this is spent in the right areas. Once upon a time, Europe was dotted with wind mills. UsedThe wind turbines of the 21st century are quite different. Tall, white and sleek, nearly always three-bladed, made of a complex mixture of fibreglass, carbon, wood and steel, it might seem to a casual observer that wind turbines everywhere, from Sweden to Spain, look pretty much the same these days. chiefly for grinding grain, they had four or more wooden shutters that acted as blades.