Businesses can purchase renewable energy credits to offset any dirty fuels they may be using in the process of doing business. For instance, power generation plants or retail electric providers can use REC’s to offset the electricity service they sell so that it is considered clean energy. Currently in the state of WA there are 1996 Sewage Gas and Biomass-Based Components of Sewage facilities selling this type of REC. These renewable energy credits are Registered and in good standing with the state of WA.