This is quite an innovative project and use of 3D printing. A company called Omni3D is seeking funding on Kickstarter in order to produce their AirEnergy3D, 3D printable wind turbines. For every purchased turbine they will donate another turbine to Africa. The turbines can generate up to 300 watts of power, which isn't a ton but enough to power multiple smartphone chargings and a couple of lights. More details on this incredible project can be found here: http://3dprint.com/11819/airenergy3d-omni3d-wind-print/

Below is a picture of the Wind Turbine: