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Are they dangerous?
There have been angry debates between scientists and campaigners about whether GM foods are safe or not. Campaigners against GM foods say:
- GM foods can damage your health - research showed that rats eating them didn't grow properly. New diseases could also be created by accident.
- Different species are being mixed up - to give a tomato a more reddish colour, it may be given parts of a very red fish, which seems to be against nature.
- Because GM foods are new, there has not been any long-term testing to see if they are dangerous to humans.
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