WIND - Engineers design, test taller, high-strength concrete towers for wind turbines

Engineers have designed and tested a concept for concrete towers to replace the steel towers used for wind turbines. The concrete towers could be a practical way to raise turbine towers from today's 80 meters to the better winds at 100 meters or higher.

http://www.sciencedaily.com/releases/2013/05/130515094800.ht