Efforts have included an ongoing lighting retrofit project, which included a retrofit of the large gymnasium lights, a temperature setback program, and the Million Monitor Drive. Smith College is also part of the Massachusetts Renewable Energy Purchasers, a group of eight colleges that bought 20,500 megawatt-hours of wind energy in January 2006. Energy use at Smith has recently experienced a four percent reduction through efficiency and conservation efforts, and other initiatives have included alternative boiler fuels and student energy conservation campaigns. A cogeneration facility that is currently under construction will effectively cut the campus's emissions in half.