Switch to grass – In a recent study at the University of Nebraska-Lincoln, researchers have been looking at switch grass as a potential source for biofuel production. The 5 year study determined that switch grass yields 540 percent more energy than is needed to grow it. This discovery not only indentifies the grass as an energy efficient alternative to fossil fuels, it also can be used as a means to enhance rural economies and reduce greenhouse gas emissions.
http://ianrnews.unl.edu/static/0801070.shtml
http://www.biofuelreview.com/content/view/1399/