Many colleges and universities across the United States have adopted sustainability in their curriculum and operations. Academic libraries need to support the mission of their university and therefore must also play their part in sustainability education and operations. The library and information science literature shows the term “green library” to be a hallmark for a library building with an environmentally friendly design. However, there are very few academic libraries in the United States that are LEED certified. I argue that a green library is more than what the architecture entails. By using example initiatives and providing recommendations for green library operations, it is determined that a green library does not necessarily entail a green building, but it does involve a green mission.