1, super weed problem
If transgenic high-yield crops transfer high-yield genes to surrounding weeds through pollen introduction, it will lead to the emergence of super weeds, cause genetic pollution to natural forests and bring unpredictable consequences to other species in these areas.
It will also lead to the abuse of herbicides, resulting in soil hardening, soil degradation and environmental pollution. With the popularization of transgenic herbicide-resistant crops, the dosage of herbicides may increase, which may lead to the increase of herbicide residues in food.
2. The problem of sterile gene
If the sterile genes of transgenic sterile varieties are widely spread in planting areas, it will lead to the collapse of local agriculture. DPL and USDA jointly applied for the patent of "termination sub-technology", which was approved by the US Patent Office on March 1998. The patented technology can make the seeds obtained after crop planting sterile. Although the seeds were harvested, they could not be kept as seeds. The acquisition of "terminal sub-technology" has aroused great international repercussions.
Many countries believe that because the seeds produced by "terminator technology" are indistinguishable in appearance, once planted, it may cause irreparable losses to production by selling or exchanging seeds that cannot germinate. The artificial spread of pollen will cause a large number of sterile genes to spread in planting areas, which will lead to the collapse of local agriculture. In order to maintain the world food security system, many countries and organizations demand that the termination of sub-technology be prohibited.
3. Toxin gene problem
If the toxic protein gene can be expressed in plant nectar, it may cause pollinators such as bees and plant communities to collapse, and may even endanger the living environment and health of other animals, people and animals.
4, medical problems.
If plants used as food raw materials are genetically modified into medicinal plants, cross-pollination will make edible plants have medicinal value, thus polluting human food. In addition, if the pesticides produced by transgenic insect-resistant crops kill pests (including some beneficial insects), it will inevitably destroy the inherent food chain in nature and have an adverse impact on the ecosystem. Moreover, these substances harmful to insects may also be harmful to humans.
5. Potential toxicity
Genetically modified foods can produce toxins to kill target organisms, thus increasing production. However, what effect these toxins will have when they enter the human body with genetically modified foods has not been confirmed. Although there is no example that the toxin of genetically modified food is harmful to human health in today's experiment, long-term and cumulative harm is likely to lead to risks.
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