We all know wind turbines are a great way to harness emissions free energy, but some people just carry a distaste for their huge pylons, rotors and the way they look in juxtaposition to the landscape. But German architect Wolfgang Frey has come up with a great idea to do something about it – popping mini turbines on top of trees! Frey put a 3.5m diameter wind rotor atop a douglas fir to generate 5 to 6 kW. Despite the 30% power loss due to this particular placement in a canopy, the turbine still provides enough energy to supply the needs of the nearby houses, including Frey’s.