genetically modified food.
...ve been in use for many years. Furthermore, although this new technology is wildly used, there is little evidence about it. An article which from science magazine illuminated that there are many opinions about the health risk of genetically modified food but few date. In fact, there are few peer-reviewed publications of clinical studies on the human health effects of genetically modified food exist. Meanwhile, other researchers point out genetically modified food will cause several potential dangers, such as Allergic reaction, Increased toxicity, Resistance to antibiotics, Spread of "superweeds.¡±, Harm to other organisms and Demise of safe pesticides. Besides, another crucial trouble is the risk of environment. Introducing genetically modified food into the environment must create a range of potential risks. Firstly, some herbicide-tolerant plants may transfer their tolerance to related plants, creating ¡®superweeds¡¯ that are difficult to control by environmentally friendly herbicides. Then the quantity of toxic herbicides is used far more than before. Secondly, genetically modified food plant varieties may be unstable in the long-term. Their gene combinations may be easy influence by the sudden changes. Thirdly, genetically modified animals such as pigs or salmon, modifications for faster growth and larger size could transfer to native or feral populations should the genetically modified food escape and interbreed. This could increase the fitness of feral animals, alter population dynamics or breeding patterns and disturb ecosystems. Fourthly, genetic pollution could happen, if human can not deal with genetic modified carefully, all kinds of plants and animals genes may spread uncontrollably throughout the environment unanticipated consequen...