The program focuses on the scientific methods and tools that can be used to observe, monitor, and respond to environmental impacts. The program harnesses the expertise of the Earth Institute's Lamont-Doherty Earth Observatory at Columbia University -- a world leader in the earth sciences. The curriculum emphasizes the practical application of science in addressing the critical sustainability issues of our time. Graduates work within a variety of public and private organizations, integrating scientific knowledge in decision-making. A part-time option and evening classes accommodate the schedules of working professionals.