The opposing students may put forward some reasons from the aspect of "great harm": (1) The emission of automobile exhaust has caused environmental pollution and seriously affected people's health. (2) The appearance of entertainment facilities such as TV makes the communication between people less and less, and the human feelings are weak. (3) The emergence of the Internet has given some people the opportunity to disrupt people's production and life. ...
Disadvantages: 1: Environmental pollution. This is the most direct and obvious disadvantage.
2. Species extinction is accelerating. This is caused by environmental pollution and human hunting. It also belongs to the disadvantages of scientific and technological development.
3. Personal safety is increasingly insecure. Now tens of thousands of crimes occur on average every day. Most of their criminal methods are related to the current new technology. Especially gun-related crimes, ordinary people can't prevent them. From the Second World War, we can already see that with the development of science and technology, the damage and losses caused by the current war are far from comparable. It may even lead to the fate of human extinction.
Human's physical quality is not as good as before. With the development of science and technology, the emergence of vehicles such as air cars, trains and planes has greatly changed human daily life. Human beings are no longer always dependent on their own legs, so the physical quality of human beings is not comparable to that in the past. In today's society, it is impossible for Xiang Yu to "pull out mountains and rivers". If this situation continues to develop, it may make people's limbs atrophy and make people appear.
5. All kinds of emerging germs appear constantly, and the lethality of many germs has far exceeded the destructive power of previous germs. This is because the rapid development of medical science and technology has accelerated the mutation of virus, so that the development speed of science and technology can not keep up with the mutation speed of virus. Maybe one day mankind will perish because of a great plague.
Although the harvester can harvest wheat quickly, it costs forty yuan to cut an acre of land! It is better to save money by hand cutting; People don't like to play and communicate together when they watch too many TV movies. Computers will make some students and adults learn badly; Mobile phones are often harmful to human body; The exhaust gas from airplanes and cars pollutes the air.
How many amazing changes have taken place in the world since mankind entered the 2 1 century. While people are delighted with the rapid development of science and technology, they have also experienced better anxiety and even disasters. In addition to the panic caused by the development of high technology, especially biotechnology, war and disease seem to directly bring mankind to the door of hell.
The epidemic of SARS in 2003, including all the speculations about SARS, is directly related to the global issue that people are paying more and more attention to: biological safety. Biosafety is a scientific and technological system for detecting, evaluating, monitoring, preventing and treating biological hazards. It is a new frontier discipline that studies the influence of various biological factors on human health, and applies existing theoretical knowledge, technology, engineering design and equipment to prevent people, laboratories and the environment engaged in related work from being harmed by potentially infectious substances and biotoxic substances. Biosafety problems are at least manifested in the following aspects:
The great harm of infectious diseases
Infectious diseases, including human, animal and plant infectious diseases, especially human infectious diseases, are the most important biosafety issues. Infectious diseases are still the leading cause of death in the world. In China, infectious diseases still pose a serious threat to people's health and national security. The prevalence of SARS is a strong proof. In addition, infectious diseases such as hepatitis, tuberculosis and influenza are still prevalent in some parts of China and some countries and regions in the world every year or the potential threat of biological weapons and bioterrorism breaks out.
In the 20th century, the whole international community made unremitting efforts to ban biological weapons and made some progress. However, in the 2nd/kloc-0th century, the potential threat of biological weapons has greatly increased, and some countries and regions may continue to develop biological weapons. In addition, the rapid development of biotechnology has greatly increased the potential threat of biological weapons, and bioterrorism marked by the "anthrax incident" in the United States poses a real threat to international security. Yuan, head of the Department of Microbiology at the University of Hong Kong, was the first scholar to isolate coronavirus, and found that coronavirus variant was the pathogen of SARS. SARS virus belongs to RNA virus, which is easy to recombine with other virus genes and become a new virus. Moreover, many experimental results also show that the new virus produced in this way will be more toxic than the parent virus. Coronavirus can be found in many animals. This virus is easy to mutate and extremely dangerous. Therefore, Yuan believes that SARS virus has great potential to become the pathogen for manufacturing chemical and biological weapons other than smallpox.
Negative effects of biotechnology
The negative effects of biotechnology are as follows: first, unexpected security problems may occur when people develop and utilize biotechnology. Just as the environmental release of various genetically modified organisms is widely concerned about the harm to biodiversity. In addition, genetically engineered drugs, vaccines, genetically modified foods, gene therapy, etc. There may be similar problems. The misuse and unethical application of biotechnology may also bring great security risks. The study of somatic cell cloning is a prominent example.
Threats to biological resources and biodiversity From the perspective of biosafety, the invasion of alien species and the loss of biological resources may cause great harm to national interests. The environmental release of genetically modified organisms poses a great threat to biodiversity.
Potential safety hazards in microbiology laboratory
Compared with other physical and chemical laboratories or other laboratories, the microbiology and biomedical laboratory is a special laboratory. Everyone who works in it and the surrounding environment in contact with it are at high risk of contracting infectious diseases or affecting health. Omissions and accidents in microbiology laboratory management will not only lead to infection of laboratory staff, but also cause environmental pollution and large-scale population infection. Accidents of accidental infection in laboratories at home and abroad are common. In serious cases, thousands of experimental animals have to be slaughtered, even leading to the death of laboratory staff.
At present, with the rapid development of biotechnology, biosafety has become a major proposition that affects the politics, economy, security and peace of the whole country and even the whole world. In recent years, especially after the "anthrax infection incident" in the United States, biosafety issues have attracted much attention at home and abroad, and biosafety terms often appear in government or non-governmental organization documents and in various media. The global epidemic of SARS will undoubtedly make countries around the world pay more attention to biological safety and regard it as an integral part of national security.
With the development of economy, the acceleration of people's life rhythm and the improvement of living standards, the amount of plastics is increasing day by day. From 65438 to 0996, the consumption of plastic packaging in China reached 2.43 million tons, with an average annual growth rate of more than 20%, especially in the garbage of cities, main traffic arteries and tourist attractions. According to the survey, the annual output of domestic waste in Beijing has reached 3 million tons, of which waste plastics account for about 3%, increasing year by year.
The growth rate reached 48%. The content of plastic in garbage in coastal cities is higher, reaching 8- 10%. These wastes
If the proportion of plastic in garbage is calculated by volume, it has reached more than one third, and it has greatly increased.
The difficulty and cost of garbage disposal. Because waste plastics are difficult to degrade for hundreds of years, if discarded in the natural environment, it will give mosquitoes, flies and
Bacteria provide a hotbed for survival and reproduction; If buried underground, it is easy to pollute groundwater, hinder the growth of plant roots, destroy soil quality and affect crop harvest; If you burn with fire, it will produce a variety of toxic gases. "White pollution" has become a major public hazard to China's social environment, which has seriously hindered the sustainable development of China's economy and environment.