Oh god so many. First off, because the produce is being modified from its original/natural state, it does not fit in with environment. Meaning you have organisms (plant and animals) that go extinct and what not. Also there are certain chemicals that are not supposed to be present in this produce, and that not only affects people, but those pollutants infect the soil/plants/water/animals. Everything is a system, and when you tamper with it, it goes out of balance. But those are some of the things I can list. Hope it helped
While some insects are plant pests, many others a necessary to pollinate the flowers of plants that eventually give us fruits, vegetables, and seeds for human use. Bioengineered plants often require less water, fertilizers, pesticides, and the use of herbicides.
