I had this idea about a year or two ago. I read an article about wind turbines in Bavaria, Germany (Germany tries to increase the generation of renewable energy). There was an interview with the major of a small town about a wind turbine which was planned to be built next to the town. The major said he is in favor of wind energy, but the people in his town don't want the wind turbine next to the town, so he tried to stop the project. And that is what you hear by most of the people: Wind energy yes, but not in our neighbourhood! That was the moment when I first thought: Hey, If the wind turbines would not be visible, nobody would have a problem. How about blending them into the landscape? How about let them look like trees? ... Or... how about using the trees itself? And bammm, the idea was born :)