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American Association for the Advancement of Science (AAAS) claims that, "The World Health Organization, the American Medical Association, the U.S. National Academy of Sciences, the British Royal Society, and every other respected organization that has examined the evidence has come to the same conclusion: consuming foods containing ingredients derived from GM crops is no riskier than consuming the same foods containing ingredients from crop plants modified by conventional plant improvement techniques."
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Potential environmental effects of GM crops include gene flow, pesticide resistance and greenhouse gas emissions.
The spread of genes from modified organisms to unmodified relatives could produce species of weeds resistant to herbicides that could contaminate nearby non-genetically modified crops, or could disrupt the ecosystem.
Genetic use restriction technology (GURT) "Terminator" would allow the production of crops with sterile seeds, which would prevent the escape of GM traits.
The escape of genetically modified seeds into neighboring fields, and the mixing of harvested products, is of concern to farmers who sell to countries that do not allow GMO imports.
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