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Can farmers grow GM crops close to conventional crops?
The distance needed between a GM and conventional crop depends on the particular GM characteristic and the level of purity needed in the conventional crop. Research suggests that in some cases GM crops could be grown 100m from conventional crops, as cross-contamination falls steeply from the edge of the crop. European legislation sets acceptable levels of contamination based on what can be detected, rather than any evidence of risk to humans or the environment.