Indiana limestone, and the interior is made of limestone and Aquia Creek sandstone. The design evokes characteristics of an English church of the Middle Ages. The extensive iconography, in stained glass, stonework, and wood carvings, has the common theme of connecting religion and scholarship. Sustainability Published in 2008, the Sustainability Action Plan was the first formal plan for sustainability enacted by the university. It focused on reducing greenhouse gas emissions, conservation of resources, and research, education, and civic engagement for sustainability through 10 year objectives. Since the 2008 plan, Princeton has aimed at reducing its carbon dioxide emissions to 1990 levels without the purchase of market offsets and predicts to meet the goal by 2026 (the former goal was by 2020 but COVID-19 requirements delayed this). Princeton released its second Sustainability Action Plan in 2019 on Earth Day with its main goal being reducing campus greenhouse gases to net zero by 2046 as well as other objectives building on those in the 2008 plan. In 2021, the university agreed to divest from thermal coal and tar sand segments of the fossil fuel industry and from companies that are involved in climate disinformation after student protest. Princeton's Sustainability Action Plan also aims to have zero waste through recycling programs, sustainable purchasing, and behavioral and operational strategies. Organization and administration Governance and structure Princeton's 20th and current president is Christopher Eisgruber, who was appointed by the university's board of trustees in 2013. The board is responsible for the overall direction of the university. It consists of no fewer than 23 and no more than 40 members at any one time, with the president of the university and the Governor of New Jersey serving as ex officio members. It approves the operating and capital budgets, supervises the investment of the university's endowment, and oversees campus real estate and long-range physical planning. The trustees also exercise prior review and approval concerning changes in major policies such as those in instructional programs and admission as well as tuition and fees and the hiring of faculty members. The university is composed of the Undergraduate College, the Graduate School, the School of Architecture, the School of Engineering and Applied Science, and the School of Public and International Affairs. Additionally, the school's Bendheim Center for Finance provides education for the area of money and finance in lieu of a business school. Princeton did host a Princeton Law School