A lawsuit filed Wednesday seeks to force the U.S. government to conduct mandatory reviews of genetically engineered foods and require labeling of such foods once they are approved. The Center for Food Safety's suit against the Food and Drug Administration comes after years of lobbying by environmental and consumer groups for more stringent regulation and labeling of biotech crops. Genetically modified crops, such as soybeans, corn, and canola, are grown widely throughout the United States, and the world leader in development and marketing of the gene-altered crops is...Monsanto. Yet the United States requires no independent testing of these crops or the food products they are used in, does not mandate what data companies must submit for review, and does not require that foods that contain biotech crops be labeled. CFS and more than fifty consumer and environmental groups, filed a legal petition with the FDA in March 2000, asking the agency to adopt a more rigorous approach to biotech food regulation, but the CFS said Wednesday that the FDA had ignored the petition. At various times over the last several years, different scientists, including some within the FDA, have warned that altering the genetic makeup of a food plant by inserting genes from one organism into another...could trigger unexpected food allergies, create toxins in food, or spread antibiotic-resistant disease. CFS said the tests that exposed that potential hazard have not been conducted on any of the genetically modified foods currently marketed.