United Press International: A U.S. researcher is warning the boom in the production of biofuels might lead tropical farmers to destroy rainforests to plant biofuel crops. Holly Gibbs, a postdoctoral researcher at Stanford University’s Woods Institute for the Environment, said policies favoring biofuel crop production might actually contribute to, not slow, the process of climate change. “If we run our cars on biofuels produced in the tropics, chances will be good that we are effectively burning …