Vanderbilt University credits carbon emissions cuts to efficiency, energy sourcing and, yes, travel changes. Here’s what other college leaders can do. While Vanderbilt has an endowment of more than $10 billion and resources to dedicate to such a greenhouse gas reduction, experts say huge spending isn’t necessary for every college that wants to make an impact. Indeed, colleges and universities that top an annual sustainability index from the Association for the Advancement of Sustainability in Higher Education are in many cases public institutions — like North Seattle College, New Hampshire’s Keene State College, Michigan’s Grand Valley State University, and Arizona State University.