GE helps old wind turbines increase power production by lengthening their rotor blade
 

Building new fleets of windmills isn't the only way to meet increasing demand for breeze-based energy, it seems. General Electric plans to get more renewable energy out of some of its existing turbines by lengthening their blades. You see, shorter...

http://www.engadget.com/2014/05/27/g...=rss_truncated