Industrial symbiosis is a subset of industrial ecology with a particular focus on material and energy exchange through initiatives that are aimed at achieving sharing and coordination among diverse sectors of industry. As such industrial symbiosis looks at engaging diverse organizations or industrial systems to create networks that foster reusability, collaboration, co­-innovation and other forms of synergistic exchange. A simple example of this would be a wastewater treatment plant providing cooling water for a power station and the power station, in turn, supplying steam to an industrial user. In this way, industrial symbiosis systems can collectively optimize material and energy use to achieve efficiencies beyond those achievable by any individual component alone.