PowerPoint slide only for something related to urban communities. You can use this diagram for example, to explain any type of process or even to extrapolate a growth cycle. Download this editable PPT at http://www.24point0.com/ppt-shop/shapes/circles-spheres/concentric-circles-editable-ppt And also you can download the same set of 3D Concentric Circles Diagram at http://www.muezart.com/keynote-slide-3d-concentric-circles.html