Not only is this high-tech Christmas tree energy efficient, it is also good for you. Now, if we could just get a version of this tree that runs on the pedal-power of one person, we would have a cool Christmas tree that gives grandma something to do while we open presents.

The 700 LED lights on this particular city's Christmas tree are not connected to any sort of traditional power outlet, instead relying completely on volunteers pushing the pedals of some stationary bicycles.