In 2001, Cornell made a public commitment to reducing emissions levels to 7 percent below 1990 levels by 2008. Through added staff and conservation efforts, carbon dioxide emissions have decreased 15 percent since 2000. The University does not currently purchase renewable energy credits, but it is exploring ways to support the regional production of renewable energy through its operations and has proposed an industrial scale wind farm on nearby Mt. Pleasant. The University has committed significant resources to energy efficiency and conservation measures in campus buildings, and utilizes a cogeneration plant, a hydroelectric dam, and even nearby Lake Cayuga to power and cool the campus, reducing the need for energy from the grid.