In essence, it comes back to Ridgefield in the form of electrical energy. Ridgefield is a member of the Housatonic Resource Recovery Authority, which oversees municipal waste utilization in 10 towns. The transfer station on South Street collects more than 10,000 tons of garbage every year. The garbage is hauled to an energy-conversion center in Bridgeport, which burns the trash, producing steam, which is then converted into electrical energy through a generator. The resulting megawatts are sent to a regional distribution utility which puts it up for sale on the regional power grid.