The Power Plant garden at the National Arboretum in Washington, D.C., displays a variety of plants that may provide a valuable and renewable source of bioenergy for America. Bioenergy is a renewable energy made available from materials derived from biological sources. Sugar beet is a root vegetable native to the Atlantic islands, North Africa, southwestern Asia and Europe and could be important in the production of sugar ethanol. Sugar beet is already grown in 11 U.S. states and tests have shown that a ton of sugar beet could yield more ethanol than a ton of sugarcane. The byproducts of sugar beet processing include molasses and beet pulp, which can be used for livestock feed. This photograph shows sugar beet growing in the Power Plant garden at the National Arboretum in Washington, D.C. on August 19, 2008. USDA photo by Bob Nichols.