The bird’s eye view of Yale reveals many green spaces; some of these green spaces are actually green roofs. One such example is Cross Campus. Tucked underneath the grass and walkways at Cross Campus is the Bass Library, which contains 200,000 volumes and is a popular student hangout. Its grassy roof provides more than just shelter from the elements.
Having a roof covered in vegetation decreases, or in this case eliminates, stormwater runoff as precipitation is absorbed by the soil and drawn up by the plant life. Beyond stormwater management, the roof also regulates the building’s temperature and reduces operating costs. In addition to the lawn itself which is a popular spot for springtime study groups and frisbee tossing, the Bass Library houses an underground sustainable cafe that emphasizes locally-grown and organic fare.