An adhesive roller having an elongated strip with a backing layer and an adhesive layer overlying at least a portion of one side of the backing layer. An example of the method includes receiving data, and making assessments regarding the data. Apparatus and method is disclosed for generating usable power derived from hydro-gravitational forces available at a site having a source of water at a first elevation higher than a second elevation at a selected location where the usable power is to be derived.