Once the mutant genes are out of the bag, there is no going back. Genetically modified organisms contaminate existing seeds with their altered material, passing on modified traits to non-target species. This creates a new strain of plant that was never intended in the laboratory. In North Dakota, recent studies show that 80% of wild canola plants tested contained at least one transgene. In Japan, a modified bacteria created a new amino acid not found in nature; it was used in protein drinks and before it was recalled it cause severe mental and metabolic damage to hundreds as well as several deaths. Japan banned GMOs after this horrific experience. Monarch butterflies have also died after their favorite food, milkweed, was cross-pollinated from Bt corn which rendered it toxic to the endangered species.
GMOs are not the answer for global food security. Genetically engineered crops have shown no increase in yield and no decrease in pesticide use. In many cases other farm technology has proven much more successful, and even Monsanto agrees that its genetically engineered crops yield less than conventional farming.