The gallery space in the museum now exceeds 38,000 square feet, surpassing the Portland Museum of Art and making it the largest art museum in Maine. In the fall of 2009, Colby launched "Green Colby" to highlight Colby's environmental policies (carbon footprint, conservation, student involvement etc.). The school has signed a number of official agreements to reduce its environmental impact, including the Maine Governor's Carbon Challenge and the American College and University President's Climate Commitment (ACUPCC). As of April 2013, Colby became the 4th institution of higher education to achieve campus carbon neutrality. All of the school's electricity comes from renewable sources—hydro and biomass—with 10 percent of campus electricity provided by an on-campus cogeneration turbine. The college has stated that all new buildings will comply with a minimum LEED silver standard, and renovated buildings will also include green features. The dining halls make an effort to purchase local and organic foods, and the elimination of trays has saved 79,000 gallons of water and 50 tons of food waste annually. Colby also has a composting program which processes more than 100 tons of food and yard waste annually. On the College Sustainability Report Card 2009 Colby earned a B; Colby's grade was brought down by its lack of endowment transparency and shareholder engagement. Colby's 1,800-plus students, evenly divided between men and women, come from every state and more than 60 countries. Colby students are listed as 67.2% white, 10.2% unknown race, 24% of its students being ALANA (Asian, Latino, African American, etc.) and 7% being international. Colby's was one of the five original schools to partner with the Shelby Davis Scholarship program for graduates from the United World Colleges, dramatically increasing the international student population. Colby also participates in the Posse Foundation for multicultural scholars. The college hosts myriad student-run organizations, ranging from student-run government to a cappella groups and more. The Student Government Association (SGA) advises and interacts with the college administration on issues ranging from policies and procedures to class presidents and dorm heads; it is also responsible for allocating funding to other student-run organizations. The Student Programming Board is the student organization which plans speaking events, concerts, dances and other gatherings. Other student organizations range from a radio station and a newspaper to the Rugby team, Woodsman team, the Colby Outing Club, and more. The Colby Mules compete in National Collegiate Athletic Association (NCAA) Division III, the New England Small College Athletic Conference (NESCAC), and the Colby-Bates-Bowdoin Consortium.