What are some ecological concerns that should make genetically modified food illegal?

Though they should not necessarily make GMO foods illegal, the following are some of the concerns that should be addressed:

  • The possibility that growing GMO foods may cause greater weed resistance within a shorter amount of time.
  • Potential harm to soil from the greater amounts of pesticides used on GMO crops
  • Possible harm to beneficial insects from varieties that are engineered to produce a substance that kills insects
  • Greater enviromental pollution and higher amounts of pesticides on the foods that are genetically engineered
  • Cross-pollination of GMO varieties with non-GMO varieties that transfers the GMO to non-GMO and organically grown varieties.