The No. 1 ranked Ivy League school in Sierra Club's "Coolest School" rankings, Cornell plans to be carbon neutral by 2035 with carbon emissions down 30 percent since 2008. One-quarter of dining hall meals are sourced locally and sustainably, and more than 64 percent of waste on campus is recycled or composted, including 550 tons of food from the dining halls. Students at the Ithaca, New York, school can choose from more than 400 courses and 28 majors to study sustainability in every college, and 20 percent of faculty are involved in sustainability research. The Atkinson Center for a Sustainable Future unites three aspects of sustainability — energy, the environment and economic development — under one roof. In addition, there are more than 40 active green clubs on campus.