Abstract: An electric generation device such as a vertical axis wind turbine is installed in existing structures like electric transmission towers to provide a source of “green” energy, without significantly impeding power generation and without creating additional impact on the landscape or environment, and without significantly obstructing the public view. This system has direct access to the electric grid at the tower where installed and provides many environmental benefits. Specifically, the system would not require the use of additional land or space and would not require additional transmission lines over a new right-of-way to transmit the power so generated to the grid.