sentences:  In 2006, the Center for Food Safety, a US non-governmental organization that is a critic of biotech crops, and others, challenged this deregulation in the California Northern District Court.Organic growers were concerned that the GM alfalfa could cross-pollinate with their organic alfalfa, making their crops unsalable in countries that ban the growing of GM crops.The District Court ruled that the USDA's EA did not address two issues concerning RRA's effect on the environment, and in 2007, required the USDA to complete a much more extensive environmental impact statement (EIS).