You'll recall a recent State of the Union address discussing SwitchGrass as a fuel supplement in order to make the United States less energy dependent on foreign oil. I was reminded of this by an e-mail from the Business Librarians' listserv, with these links:
Switchgrass ethanol: better than corn?
Switchgrass-to-ethanol comes out clean in study
A study published last week by the Proceedings of the National Academy of Sciences (PNAS) found that switchgrass contains five times more energy than it takes to grow it, which makes it significantly more cost-effective than corn. Switchgrass Yields Five Times More Energy Than is Used to Grow It.