ScienceDaily: African farmers risk being forced from their lands by investors or government projects as global demand for biofuels encourages changes in crop cultivation. Research from the University of Edinburgh has found that livelihoods may be put at risk if African farmland is turned over to growing crops for biofuel. With growing pressure to find alternatives to oil, global biofuel production trebled between 2003 and 2007 and is forecast to double again by next year. In Africa, …