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.

"Benefits": Since the first computer appeared in the United States, people have given computers a glorious mission.

Facts have proved that the appearance of this modern tool not only proves that science and technology have entered a new platform, but also proves that communication between different regions of the world cannot be separated from it. It seems to be the driving force to accelerate social development, weaving a net around the world with invisible chains, trapping development and life.

As a member of the current society, we should not only realize the importance of science and technology, but also study science and technology hard, arm our minds with science and technology, have the courage and determination to devote ourselves to science, and use science and technology to develop the broad mind of all mankind. More importantly, we should also educate our future generations to love and respect science.

It is precisely because of the importance of science and technology that our national leaders have repeatedly proposed to vigorously develop science and technology.

Since the first computer appeared in the United States, people have given computers a glorious mission.

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Facts have proved that the appearance of this modern tool not only proves that science and technology have entered a new platform, but also proves that communication between different regions of the world cannot be separated from it. It seems to be the driving force to accelerate social development, weaving a net around the world with invisible chains, trapping development and life.

Science and technology is a weapon for human beings to overcome and transform nature and an important force to promote the development of social productive forces. Every development of science and technology is a leap in the history of human civilization and an epoch-making victory for human beings to conquer nature and self. In the early days of primitive society and slave society, it was precisely because of the casting of bronzes and the use of ironware that social wealth doubled and caused changes in social form. In the industrial revolution in the18th century, it was precisely because of the wide application of steam engine technology that the industrial revolution entered a new stage, thus doubling the wealth of the capitalist world. After the Second World War, it was precisely because of the influence of the third scientific and technological revolution, which mainly focused on electrical appliances, that it greatly promoted the economic recovery of post-war capitalist countries and the substantial economic growth of socialist countries, and promoted the rapid increase of social wealth and the fundamental improvement of people's lives. So the advantages of scientific and technological development are obvious.