At a hearing of the House Agriculture Committee this week, opponents of mandatory labeling of GMO foods trotted out the now familiar argument that genetically engineered crops are the key to feeding Earth’s mushrooming population. One witness was Professor Nina Fedoroff of Penn State University, who cited a study by German agricultural economists to bolster her claim that GMOs have increased crop yields by about 20 percent.
North American GM crops not showing higher yields than conventional crops in Europe