1. Genetic engineering may cause a wide range of ecological and environmental safety problems.
2. The threat of genetic engineering to human health.
3. Transgenic plants that may cause genetic pollution are obtained by artificially transferring a certain target gene using genetic engineering technology. If these foreign genes are artificially transferred to other organisms due to "gene drift", it will cause hybridization or pollution of natural gene banks. Plants and microorganisms will make genetic pollution an uncontrollable and lasting disaster.
Definition of genetic engineering
Emphasis is placed on introducing new combinations of exogenous DNA molecules into new host organisms for reproduction. This new DNA molecular combination is designed and operated according to the engineering method, which endows genetic engineering with the ability to cross the barrier of natural species, overcomes the inherent limitations of species, and expands and brings the possibility of biological directional transformation, which is the biggest feature of genetic engineering.
Refer to the above content: Baidu Encyclopedia-Genetic Engineering