Some people will tell you that everything we eat is genticically modified as a way of trying to persuade you those of us campaigning against government / corporate efforts to force GM foods into our diet are just scaremongers. There is a big difference however between selective breeding which farmers have done foir thousands of years, and re-engineering plant DNA so the plant still produces its foodcrop even efter being splayed with weedkillers and pesticides deadly to humans in very small quantities.
Read longer article on the obfuscatory tactics used by the biotech lobby to make genetically engineered foods (i.e. those with genes inserted that are taken from completely different species - spider genes inserted into tomato DNA for example) to make it sound as if these Frankenstein Foods are produced by methods no different to the selective breeding farmers have used to improve crops since the stone age.
The Insanity Of Those Who believe Genetically Modified Foods Are Safe