Genetic engineering allows scientists to create man-made plants (corn, soy beans, canola), animals (clones) and micro-organisms (crops). These genetically modified organisms, or GMOs, can spread and interbreed with natural organisms, and contaminate non-GMO environments for future generations in unknowable and unmanageable ways The danger is that, once released into the environment, GMOs cannot be recalled. Organic food is GMO-free, but otherwise, look for a GMO-free label.