The Cincinnati Zoo & Botanical Garden’s green roof atop the giraffe building installed in 2007 is one of the first in the region. Using beefed up roof supports, a lightweight engineered substrate, and carefully chosen plants, green roofs offer another way to slow down rain water, which helps relieve some of the load on our sewage systems during peak precipitation periods. Green roofs also provide greater energy savings through higher insulation values, and they provide beauty. Although it is visible from the main loop, it is a bit too distant to observe the many interesting plants that are being trialed. Information from the trials is being passed to the green industry to help advance this new technology.