What is the reason for the official end to the use of leaded gasoline around the world?

With the development of society, the earth's environment is also becoming more and more serious. Due to the deterioration of the earth's environment, a lot of extreme weather continues to arise, and because of the environment. The pollution produced has also had a great impact on human life.

According to a news ** report, the United Nations Environment Programme (UNEP) announced that the world will officially end the use of leaded gasoline. Why the United Nations Environment Programme will end the use of leaded gasoline, we will give you a science popularization today.

The role of leaded gasoline Leaded gasoline has been in use since the beginning of the last century and has been widely used in many countries in a short period of time. This shows that it is actually very cost-effective, and before the 70s of the last century, all gasoline produced around the world contained lead. This kind of leaded gasoline not only has a low production cost and low technical requirements, but more importantly, leaded gasoline can improve the performance of automobile engines, make the use of cars more convenient and prolong their service life.

Hazards of Leaded Gasoline Although leaded gasoline has many advantages, there is one disadvantage that is why it cannot continue to be used. That is, the lead contained in leaded gasoline cannot be completely burned during the combustion process, but will be emitted into the atmosphere. In the long run, this will lead to fundamental changes in the air environment, which will also affect human health, and leaded gasoline will not only cause respiratory diseases, but also cause heart disease, stroke and brain damage.

Several studies have shown that leaded gasoline can cause intellectual disability in children.

Protecting the environment is to protect our health, in fact, the development of human beings and the earth's environment is one, and only when the earth's environment is in a good state, can human beings survive better. Ending the use of leaded gasoline is not only for the sake of protecting the planet's environment, but also for our own human health. Environmental protection is a long and arduous process, and we continue to make efforts.

The reason for this is to curb the environmental pollution caused by the use of lead gasoline, and I think this is necessary.

The reason for the move is reportedly to create a cleaner and greener future. Because the use of leaded gasoline can cause damage to the environment.

It's to protect the environment, to protect the air, the earth we live in now, the air environment is not very good, we need to protect it.

Don't think that many elements in chemicals will not affect the individual's body, but this is not the case, and some substances in some chemical elements will also have a strong radiation effect on the human body. The United Nations has announced that the world will officially say goodbye to leaded gasoline. Not only does this mean that leaded gasoline is officially out of the past, but it also means that people are using healthier gasoline.

The types of gasoline are different, and most fuel vehicles need to add the right amount of oil to ensure the power ** and the normal operation of the car. Perhaps some people choose the more cost-effective leaded gasoline, which contains a lot of lead and can easily cause harm to the human body. After the United Nations announced this, many people felt that unleaded gasoline would protect human health.

The first significance: leaded gasoline no longer harms people's bodies A long time ago, the gasoline refining technology in various countries is different, which will lead to some gasoline containing elements that are harmful to the human body. When people use gasoline where this element is located for a long time, people's physical conditions will also show different changes.

Every year, the number of people in the world who suffer from different diseases due to the use of leaded gasoline is not small, which largely reflects the negative impact of leaded gasoline on the human body. After the world said goodbye to leaded gasoline, our living conditions have ushered in a higher degree of improvement.

The second significance: healthy and pollution-free gasoline will replace leaded gasoline As we all know, the disappearance of any item will bring a series of effects. For example, after a cosmetics company launches a series of makeup products withdraws, the brand will never give up the particularly large makeup market, but will take a very effective development plan to find products that can replace the hot makeup.

After the leaded gasoline says goodbye to people, people will not reduce the use of gasoline, and the healthy and pollution-free gasoline is deeply loved by people. Healthy and pollution-free gasoline can not only increase the power of the car**, but also put people in a relatively safe environment.

In general, I think that the official farewell of leaded gasoline to everyone is not a particularly negative thing, but it can ensure the life and health of users. Science and technology are undergoing major improvements, and all walks of life need to use various technologies, and the more mature technology in the gasoline refining industry can extract healthier gasoline. At the same time, we must not think that cheap leaded gasoline will not affect personal health, and the result of things is exactly the opposite of what we imagined.

Leaded gasoline is particularly damaging to the human body, and people use it for a long time, and it is very likely that hidden diseases will appear.

This means that in the future, more attention will be paid to protecting the environment, and gasoline will be more resistant to burning in the future, and the pollution to the environment will be limited, which also means that it will have a great impact on the U.S. economy.

It means that the new energy era has arrived, which means that we also pay more attention to protecting the earth and protecting the environment, which is also a manifestation of people's quality.

It means that the world has moved away from the era of lead gasoline, and the global development will get better and better, and the world has entered a new era.

Adding a small amount of ethyl liquid (tetraethyl lead) to automotive gasoline or aviation gasoline can significantly increase its octane number and improve its shock resistance. As tetraethyl lead contained in ethyl solution is highly toxic, caution should be taken when using it, and it should not be used to wash machines, parts and hand washing to prevent poisoning.

English name: ethylgasoline; Ethylatedgasoline is also known as: leaded gasoline or leaded water gasoline Ethyl gasoline refers to gasoline containing a small amount of ethyl liquid.

Adding a small amount of ethyl fluid (tetraethyl lead) to motor gasoline or aviation gasoline can significantly increase its octane number and improve its shock resistance. As tetraethyl lead contained in ethyl solution is highly toxic, caution should be taken when using it, and it should not be used to wash machines, parts and hand washing to prevent poisoning. In 1923, under Kettering's leadership, GM's in-house research chemists and engineers worked for years to test hundreds of materials to reduce the crash sound and improve the efficiency and power of gasoline engines at the time.

In 1921, they finally discovered that tetraethyl lead additives could solve these problems. GM and Chemicals** have partnered to develop a process for the production of this new gasoline. "Ethyl gasoline" soon became popular throughout North America, setting off a wave of development of high-efficiency high-pressure engines.

The effect is to increase the octane number of motor gasoline and improve the car? English name: ethylgasoline; Ethylatedgasoline alias:

Leaded gasoline or leaded water gasoline ethyl gasoline refers to gasoline that contains a small amount of ethyl liquid. Adding a small amount of ethyl fluid (tetraethyl lead) to motor gasoline or aviation gasoline can significantly increase its octane number and improve its shock resistance. As tetraethyl lead contained in ethyl solution is highly toxic, caution should be taken when using it, and it should not be used to wash machines, parts and hand washing to prevent poisoning.

In 1923, under Kettering's leadership, GM's in-house research chemists and engineers worked for years to test hundreds of materials to reduce the crash sound and improve the efficiency and power of gasoline engines at the time. In 1921, they finally discovered that tetraethyl lead additives could solve these problems. GM and Chemicals** have partnered to develop a process for the production of this new gasoline.

"Ethyl gasoline" soon became popular throughout North America, setting off a wave of development of high-efficiency high-pressure engines. In order to increase the octane number of motor gasoline and improve the anti-knock performance of automobile gasoline, in the past, people took many methods, such as changing the composition of gasoline and adding additives. In 1921 an additive called tetraethyl lead was discovered.

What we call leaded gasoline is the addition of a certain amount of tetraethyl lead to motor gasoline. Adding a certain amount of tetraethyl lead to automobile gasoline can play a certain role in increasing the octane number of automobile gasoline and improving the anti-knock resistance of automobile gasoline.

Photo by Pacific Automobile Network Q&A).

The harm of leaded gasoline is that after the car is burned, the lead flutters with the air, mainly in the form of aluminum oxide, which endangers the human hematopoietic function and causes gastrointestinal poisoning after entering the human body. In severe cases, it can cause central nervous system toxicity and damage to the cardiovascular and renal systems. Lead is widely used in automobiles, and lead will remain for the life of a car's lead-acid battery.

Lead particles that enter the air as car exhaust fumes can enter the body and respiratory tract, leading to various diseases.

When did leaded gasoline first become found to be toxic?

Although many American biologists have long stood up for boycott, lead manufacturers have persevered for years. In the 60s of the 20th century, the rate of lead poisoning among children in the United States had reached more than 80%. In the 70s of the last century, the American geologist Patterson found that the lead content in the natural environment of roads was 80 times that of the deep sea, the lead content in the air was 1,000 times that of a century ago, and the lead content in the bones of people in that era was 700 to 1,200 times that of the ancients.

Other biologists have also highlighted that lead is likely to influence trends in people's cognitive levels. But the cleaner the fuel, the smarter people are.

How does leaded gasoline cause damage to the human body?

Lead is particulated in organic exhaust gases and flutters with the wind. After lead enters the human body, the key is dispersed in the liver, kidney, spleen, gallbladder and brain, and the liver and kidney are the largest. After a few weeks, lead migrates from the above structures to the bone, where it accumulates in the form of insoluble lead calcium phosphate.

About 90 to 95 percent of lead is stored in bones, and only a small amount of lead is stored in the liver, spleen, and other organs, and lead in bones is usually relatively stable.

According to the inhalation of lead gasoline in pregnant women, the lead in the body will accumulate in the plasma, causing harm to the baby, because the baby's resistance is not enough, the injury is high, and it can cause symptoms of lead poisoning and congenital hypoplasia of the baby. In addition, lead poisoning symptoms are particularly harmful to the early growth and development of the brain in children. Therefore, leaded gasoline has caused great harm to the natural environment and people.

In addition, lead can poison the catalyst in the fume purifier for exhaust gas problems.

Harm to the respiratory tract, lung infections, allergies, poisoning, shock and other hazards, so many countries are promoting unleaded gasoline.

It will damage the human hematopoietic function, will cause gastrointestinal poisoning, and in severe cases, it will lead to nerve poisoning, which will affect kidney function and damage the heart.

The harm is really great, and sometimes it can put a person's life at risk, and it may even affect a person's respiratory tract.

Lead is quite harmful, especially for Lu Hetong. Lead affects the nervous system, cardiovascular system, skeletal system, reproductive system, and immune system. Diseases of the gastrointestinal tract, liver, and brain, etc. Hengpai.

The harm is particularly great, and it will affect nerves, hematopoiesis, blood vessels, endocrine, immunity, and bones.

Through the corresponding technology, as well as the main ingredient in it, there is finally this gasoline. It will produce highly toxic substances, which will also affect the human nervous system, and will also make people feel disturbed and noisy, which will make people manic and affect their health.

This kind of steam shouting silver reed oil is added to the gasoline with a certain amount of tetraethyl lead, which can be very good anti-knock. This condition may make some people become very manic, affect people's nerves, make people confused, affect people's respiratory system, and make humans have a lot of diseases.

It's formed by something fused together. Destroying the environment will make people have heart disease, stroke, will make the smell very bad, and will fail to make many plants unable to survive.

Answer C Analysis: This question is a chemical and environmental question, the core of which is the atmospheric pollution of lead Gasoline is gasified in the cylinder of the internal combustion engine and then ignited and burned when it is compressed to the appropriate part, and the resulting gas pressure pushes the piston and other parts in the cylinder If the gasoline is ignited before reaching the appropriate part, it will move incongruously with the cylinder piston, causing the machinery to vibrate strongly In order to prevent this premature ignition and vibration, anti-seismic agents are often added to gasoline As early as 1921, American scholars discovered organic leads, mainly tetraethyl lead PB (C2H5) 4 has a good seismic effect and has been widely used in the world since then, however, it was found that only 20% of the tetraethyl lead added has a role, and the remaining 80% is emitted into the atmosphere with the exhaust gas Taking China as an example, the lead that enters the atmosphere every year is about 900 t when the leaded gasoline enters the atmosphere at most, and it reaches 80t in Beijing alone Lead-containing compounds are very harmful to the human body, which can be absorbed into the human body through breathing or **, affecting the nervous system and causing consciousness disorders, causing auditory hallucinations, visual hallucinations, convulsions, and coma, Until death, especially affecting children's mental development Therefore, at present, all countries use other anti-seismic agents instead of lead preparations, and China has also promoted the use of unleaded gasoline and achieved good results