More info/pics: http://apcommunity.blogspot.com/2009/06/green-graduation-cap.html
Here’s my Class of 2009 Graduation Cap for the University of California Berkeley.
It is covered with a small “green town,” complete with a solar power plant and a wind turbine.
The solar panel works, and actually drives the wind turbine. So while not true generation, it helps to demonstrate renewable energy at least.
Duration : 0:0:40
