Cars can be seen everywhere, which not only does great harm to people's body and mind, but also pollutes the atmosphere. All living things in the world are infringed by this "scientific and technological product" to some extent. It is selfish for human beings to take care of the safety of other creatures on earth for their own convenience. To say the least, cars are also very harmful to human beings. Freon in air conditioners and refrigerators also destroys our precious atmosphere. The so-called high-tech products make the world dirty and rigid. The land of freedom is swallowed up bit by bit by human beings, the sky of freedom is shrunk bit by bit by human beings, and the ocean of freedom is occupied bit by bit by human beings.
Environmental pollution. This is the most direct and obvious disadvantage. The extinction of species is accelerating. This is caused by environmental pollution and human hunting. It is also a disadvantage of scientific and technological development. 3. Personal safety is increasingly insecure. There are now tens of thousands of crimes on average every day. Most of their criminal methods are related to the current new technology. Especially gun-related crimes, ordinary people are even more difficult to guard against. 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 appearance of vehicles such as air cars, trains and planes has greatly changed human daily life, and human beings no longer always rely on their own legs. Therefore, the physical quality of human beings cannot be compared with the past. In today's society, it is impossible for Xiang Yu to "pull out mountains and rivers". However, if this situation continues to develop, it may lead to the atrophy of human limbs and the emergence of new forms of human beings. 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 technology has accelerated the mutation of the virus, so that the development speed of science and technology can not keep up.
Scientific and technological development, let's talk about oil! Oil is the blood of the earth, and human beings have pumped it away. This is the end. Oil is also used to lubricate the center of the earth. When there is less oil, there will be more earthquakes, just like machines.
How many amazing changes have taken place in the world since mankind entered 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 invasion of various viruses, the exhaust gas behind cars, the exhaust gas from factories and so on. Don't invade our beautiful home. Why are our homes threatened, why are trees cut down in large numbers, and why is the air not fresh? These are all kinds of criminal evidence brought by science and technology. Modern science and technology have brought us some comfort and convenience, but at the same time, they have also brought about a wide range of influences. How can human beings live comfortably without a beautiful environment? If people don't remedy their mistakes quickly, mankind will eventually be destroyed by science and technology.
We don't deny that the development of science and technology has brought benefits to our lives. However, we believe that the disadvantages brought by technology outweigh the benefits. First of all, although cars are convenient for us to travel, the exhaust gas from archways has caused environmental pollution and affected human health. Secondly, the appearance of entertainment facilities such as television brings convenience to people, but it also virtually blocks the communication between people, which is weak. There is also the emergence of the Internet. There is no denying that some lawless elements have the opportunity to disrupt people's lives and wait for a series of side effects brought by your so-called high technology. How can you just sit back and watch?
Although scientific development has made great progress in society and promoted the improvement of our living standards, it is precisely because we overemphasize development that we ignore environmental problems. In the process of development, the damage to the environment caused by our pursuit of interests makes our home miserable, and the death of wild animals makes it endangered or even extinct. Industrial wastewater has caused water pollution, resulting in a large reduction of drinking water.
Industrial waste gas has caused air pollution, and ozone hole has caused glaciers in the North and South poles to melt and sea level to rise. This is all brought about by scientific development.
2. Scientific development makes us overexploit the earth's energy, but those non-renewable resources are seriously lacking. At present, we are even exploiting the resources of our descendants for decades or even hundreds of years. So when there is no new energy to provide at that time, what will they live with?
The development of science has brought the shadow of war. Every country wants its own country to be the strongest, so they must develop those powerful scientific weapons for this purpose. The development of these weapons needs money first. where is the money to come from? Of course, it comes from every civilian, so we have to bear this pressure, and the research and development of weapons needs experiments, where to experiment, and some unmanned areas. Then, the weapons test caused serious damage to the area, making the land unusable. And the radiation it produces remains for a long time, then this land will be completely abandoned, which is a great waste to our society now.
When the country is strong, people will have ambitions. What will happen if they have ambitions? Of course they will wage war, although not many people are participating in the war now, just a few missiles. But it is these missiles that can set the economy of a country or a region back for decades, and how much financial resources are needed to develop to this stage.
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.
1. computer: because of the computer and the network, there will be online games. So teenagers can't extricate themselves, neglect their studies and do nothing. Computers and television have caused our myopia. Without TV and computer, we might not be nearsighted.
2. Automobile: Although its arrival has brought great convenience to people, it has also brought great losses to people. Car noise, exhaust pollution and car accidents in cities have caused countless deaths and injuries. People still want to invent some cars that don't pollute the environment, but at the same time they waste resources. With the population expanding, if everyone has a car, is there still room for human beings to live? A man wrote an article. He simulated the future. Nowadays people only rely on high technology but are too lazy to do it. They got many diseases and caused human death. Some people may say, what should I do if I get sick without high technology? Then let me tell you, more people die from car accidents than from diseases every year. The emission of automobile exhaust has caused environmental pollution and seriously affected people's health.
3. Air conditioning: Like the industrial products we use, air conditioning will inevitably bring a certain burden to our environment. A few years ago, the impact of air conditioning on nature mainly focused on the destruction of the ozone layer by refrigerants, but in recent years, due to the development of refrigerant renewal, this is no longer the main factor. Reduce people's adaptability to the natural environment and reduce immunity.
4. Nuclear energy technology (atomic bomb): The development of atomic physics theory means that human beings have mastered nuclear energy technology. As we all know, the nuclear disasters in Hiroshima and Nagasaki in Japan have brought "terrible peace" to mankind for 50 years, and mankind has the ability of self-destruction for the first time. Nuclear accidents emerge one after another, among which Chernobyl in the Soviet Union is the most famous. With the development of chemistry, we have gained unprecedented ability to transform nature, but our gunpowder and explosives have also hurt tens of millions of human compatriots.
The appearance of entertainment facilities such as television makes the communication between people less and less, and human feelings are weak.
6. The physical quality of human beings 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 brought great changes to human daily life. Humans no longer always rely on their own legs, so the physical quality of human beings is not the same as before. 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 technology has accelerated the mutation of the virus. So that the development speed of science and technology can't keep up with the speed of virus mutation.
7. Harm to nature: For nature, the development of science and technology is almost harmful. First of all, from the perspective of human beings, it has been very harmful since human beings came to this world, because human beings are selfish and have destroyed the natural ecological balance. Nowadays, the development of science and technology has brought convenience to human beings, but it is also harmful to human beings and nature, leading to the extinction of precious animals; Although cloning technology can save those endangered animals, it is still human beings, or human technology, that makes those animals endangered. In my opinion, the technology of cloning is just that human beings are making up for their mistakes.
How many amazing changes have taken place in the world since mankind entered 2 1 century. While people are delighted with the rapid development of science and technology, they have also experienced more disasters. War and disease seem to directly lead mankind into the gates of hell.
Thanks to mobile phones, users' brains are often irradiated, which is very harmful to people's brains. According to statistics, when people use their mobile phones for more than 1 hour a day, their instantaneous memory will drop by 30%.
2003 SARS virus (SARS)
There was no such word before.
Affected by SARS, Singapore will lower its economic growth forecast for 2003.
2003-04-09 10:52
The Singapore government is prepared to lower its economic growth forecast for 2003. The spread of Severe Acute Respiratory Syndrome (SARS) has reduced the number of tourists visiting Singapore and dealt a heavy blow to the sales of shopping centers in the country.
Singapore Prime Minister Goh Chok Tong said that the government could not confirm the full impact of the SARS virus incident on the country, but admitted that the official forecast of Singapore's economic growth of 2%-5% in 2003 would be affected. Goh Chok Tong said a few days ago: "I can now say that the economic growth rate will have to be reduced this year."
Severe acute respiratory syndrome (SARS) virus has killed 8 people in Singapore and infected 106 people.
According to the Singapore Retailers Association, shopping centers were unusually deserted last weekend, although SARS affected them to different degrees due to different types and locations of goods.
Considering the double blow of the war and SARS to the industry, private analysts revised the growth forecast this year by an average of about 65,438+0 percentage points. In the survey of 65,438+00 financial institutions in Reuters, compared with last year, the average growth rate this year is expected to be 2.7%, while in the survey conducted before the Iraqi war and the outbreak of SARS in June, the expected growth rate of 5,438+0 was 3.8%.
"White pollution" mainly refers to "visual pollution" and "potential harm" to the environment.
Effect.
"Visual pollution" refers to the plastic garbage scattered in the city and discarded by people, which is harmful to the city appearance and landscape.
The destruction of the landscape, such as a large number of polystyrene foamed plastic tableware scattered on both sides of the railway, rivers and lakes, and ultra-thin plastic bags flying all over the sky or hanging on branches, has brought people bad visual stimulation, and people have a strong reaction to it.
"Potential crisis" refers to the environmental problems caused by plastic waste entering the natural environment and being difficult to degrade.
Its hazards mainly include the following points:
Recycling is not easy, because the recycling cost is high, but the utilization rate is low, so businesses can say that it is unprofitable, and it is difficult to attract the general public to carry out "white recycling" because of the low recycling price. So it's hard to recycle.
Difficult to degrade. The recovered white waste is not easy to treat. At present, the main treatment methods are incineration and landfill. If burned, it will produce a lot of toxic smoke, pollute the atmosphere and promote the formation of acid rain. As for landfill, it will remain unchanged for 100 years and will not be absorbed by nature, which will do great harm to the land, change its pH value, affect the absorption of nutrients and water by crops, and lead to agricultural production reduction. As for plastic products discarded in water or land, it will not only affect the environment, but also cause great harm to the land. This destroys the ecological balance.
Toxic substances decompose at high temperature, and plastic products have no toxic substances. However, due to its imperfect recycling equipment and simple process, many manufacturers do not have legal business licenses. When the temperature reaches 65℃, toxic substances will precipitate and penetrate into food, causing harm to important parts of the human body such as liver, kidney, reproductive system and central nervous system.
Experts found that almost all plastic products contain a large amount of plasticizer, which is potentially harmful to human body.
"Plasticizer" (plastic bags and plastic products contain a kind of "phthalate" chemical composition, which can increase the plasticity and flexibility of plastics and improve the strength of plastic products), which triggered the safety crisis of supermarket plastic wrap last year, once again broke into people's lives. This time, the problem appeared in the plastic bucket of edible oil used by ordinary people for three meals a day.
Not long ago, Guangzhou Food Safety Information Network released a message saying that a study by Tongji University confirmed that the plasticizer in plastic barrels of edible oil was harmful to human body. "With plastic barrels of cooking oil, the cooking oil will dissolve into a plasticizer that is harmful to the human body." According to the news, the research group of Professor Li Shuguang from Tongji University School of Basic Medicine collected plastic barrels of soybean salad oil, blended oil, peanut oil and bulk soybean oil sold in the market with different brands and different factory dates. It was found that almost all brands of plastic barreled edible oil contained plasticizer "dibutyl phthalate". It is inferred that the plasticizer detected in edible oil mainly comes from plastic containers. This plasticizer is toxic to human reproductive system, especially to men.
In the past, people always thought that plasticizer compounds had low toxicity, good physical and chemical properties, convenient production and low price, so their production and use were almost unrestricted. At present, China has become a big user of plasticizers, producing about 300,000 tons of plasticizers every year.
The comparative study conducted by Professor Li shows that the plasticizer detected in edible oil mainly comes from its plastic container. Among the edible oil samples collected by the scientific research team, it was found that the content of plasticizer in a certain brand of plastic barrel edible oil samples was the highest, which were 2.98 mg/L and 24.16 mg/L, respectively. The researchers believe that this may be due to the high content of plasticizer in the plastic container of this brand, or it is polluted by plasticizer during production and processing.
At the same time, it was found that the content of phthalate plasticizers in the samples had no obvious correlation with storage time. There are many factors that affect the migration rate of plasticizer into edible oil. Besides storage time, mobility and storage temperature, there are also plastic packaging materials? Plasticizer content is related: the higher the storage temperature, the faster the migration speed; The higher the content of plasticizer in plastic, the worse the compatibility between plasticizer and resin, and the greater the percentage of plasticizer that may be dissolved out. The content of plasticizer in plastic packaging materials used for barreled edible oil produced by different manufacturers is different, and the storage temperature also changes with different environments. Therefore, the content of plasticizer in edible oil did not show an obvious trend of increasing with storage time without controlling other influencing factors. The content of plasticizer in edible oil residue accumulated on the kitchen lampblack machine is very high, which indicates that a large amount of plasticizer may be inhaled into the lungs with the lampblack during cooking.
The news also said that the researchers found that the acute toxicity of plasticizer is very low, and there will be almost no acute poisoning in a short time after human intake, but this does not mean that it is safe. On the contrary, its chronic toxicity is quite harmful to human body. The results of foreign animal research show that plasticizer can lead to animal survival rate, weight loss, liver and kidney function decline and red blood cell reduction, which is mutagenic and carcinogenic.
According to experts, PVC products containing DOP (dioctyl phthalate) plasticizer are also widely used in fields related to human medical care and life, and it is difficult to replace them with other materials. Such as latex gloves, plasma bags, some blood transfusions, transfusion, respirators, children's toys, artificial leather (used as clothing, shoes, handbags, sofa fabrics, etc. ), PVC products account for a large proportion. Some developed countries have made strict regulations or corresponding suggestions on plasticizers and other additives used in these products, while the main plasticizer for medical gloves and plasma bags in China is still DOP.
What is even more worrying is that plasticizer pollution is almost everywhere at present. As time goes on, the most commonly used raw materials in the chemical industry will slowly overflow from plastic products and enter the air, soil, water and even food. "It has a wide range of uses, a large pollution area and a large number of people, which is even more powerful than pesticides and DDT." Professor Li Shuguang pointed out that few people are aware of this at present. This is a very dangerous trend. If the relevant state departments do not give effective prevention and strong control, we will bear serious consequences for this phenomenon.
With the development of plasticizer and the increase of its application range, people pay more and more attention to its safety. Governments have begun to realize the potential threat of plasticizers to human health, such as Denmark's ban on the use of phthalate plasticizers in plastics for children's toys and care products. Because most children like to put toys in their mouths, plasticizers will endanger their health; The use of DOP in children's toys is also prohibited in Switzerland.
Although different countries have different restrictions on plasticizers, they basically follow two principles: first, limit the amount of plasticizers used in plastics; Second, limit the maximum allowable migration of food. Countries that adopt the first principle include the United States, Germany, Britain and Japan. , while the Netherlands, Italy, Spain and other countries will combine the above two principles.
According to reports, China has also formulated the Hygienic Standard for the Use of Additives for Food Containers and Packaging Materials (GB 9685-94), which stipulates the varieties, scope of application and maximum dosage of additives for food containers and packaging materials. The maximum allowable dosage of DBP (dibutyl phthalate) and DOP are 35% and 50% respectively, but the maximum allowable content in food has not yet been determined.
To this end, some experts suggest that China's food industry should vigorously advocate reducing the use of plastic packaging containers, especially to avoid direct contact between plastic products and various foods and prevent plasticizers from polluting food. At the same time, increase investment in scientific research, carry out research on the toxicity of plasticizers, carry out prospective epidemiological surveys related to human health, analyze and understand the toxicity of plasticizers from the aspects of cells, molecules and genes, develop better and safer alternative products in the polymer field, and study relevant intervention and preventive measures.