The Glass Nickel is known around Madison for its commitment to environmental sustainability and responsibility. The use of waste vegetable oil (WVO) and hybrid vehicles is unique to delivery restaurants in Madison, and to most delivery systems in America. WVO vehicles are diesel vehicles that have been converted to run off used fryer grease, or other vegetable based oils. The original Glass Nickel has a system in place to automatically convert used fryer oil into fuel for vehicles. Used oil from deep fryers is transported through the building into a filtration room in the restaurant's basement. There, the oil is run through a series of filters and placed in a holding tank until needed for fuel for the delivery fleet. On the outside of the building is a diesel pump that delivery drivers and neighbors use to fill their vehicles. The entire configuration is self-contained within the store. The cars average 45-50 MPG on WVO. Because the oil is made from living plants, any carbon dioxide emissions are a zero addition to the atmosphere, as the plants used for oil--canola, corn, soy, etc,-- remove the carbon dioxide from the atmosphere. The Glass Nickel also owns and operates two hybrid vehicles in their delivery fleet. New franchisees are required to own and operate at least one Alternative fuel vehicle in their delivery fleet by their third year of operation, be it a WVO Vehicle, hybrid or electric. Furthermore, the store is in the process of converting its interior lighting from fluorescent to L.E.D. light. A new pizza oven shuts off when pizzas are not baking, saving natural gas. Only two of the GN stores currently own and operate these ovens: Fitchburg and the Atwood location. Plans are in the works for a solar array to be constructed atop the restaurant as well.