When a renewable energy facility operates, it creates electricity that is delivered into a vast network of transmission wires, often referred to as “the grid.” The grid is segmented into regional power pools; in many cases these pools are not interconnected. To help facilitate the sale of renewable electricity nationally, a system was established that separates renewable electricity generation into two parts: the electricity or electrical energy produced by a renewable generator and the renewable “attributes” of that generation. These renewable attributes are known as RECs, green tags, or TRCs. The environmental attributes they represent are things such as cleaner air and water that result from the use of less fossil-based energy. The renewable attributes or “green” attributes are sold separately as renewable certificates. Only one certificate may be issued for each unit of renewable electricity produced.