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First of all, this question is not right, because there was no mass extinction tens of thousands of years ago, and the closest mass extinction to humans occurred between 65 million years ago and the Triassic period. At that time, the overlord dinosaurs on the earth were dissipated in the long river of history due to meteorite impacts. Since the formation of the earth, there have been a total of 5 mass extinction events, among which geologists have found that the second mass extinction event that occurred in the late Devonian period of the previous year is very similar to the current living environment.
First of all, let's take a look at what caused the second mass extinction, which was discovered in research at the time. Hundreds of millions of years ago, the Earth had just experienced an ice age, when global temperatures should have been low. Therefore, according to the evolutionary theory of organisms, these organisms are able to survive in low temperatures.
However, biologists found in the studio that many plant spores were deformed. So after comparison, the researchers speculated that the plants were likely exposed to intense ultraviolet light. As a result, their genes have mutated and evolved into what we see.
At that time, the earth had just experienced an ice age, and it was reasonable that such a situation would not occur, so paleontologists speculated that it was likely that a large area of the ozone layer above the earth suddenly appeared at that time, or even disappeared directly, causing all these organisms to be exposed to strong ultraviolet rays. After these green plants are killed by ultraviolet light, the lack of food causes the extinction of other organisms. <>
Then let's take a look at what ozone is, ozone is actually a very unstable chemical molecule, although they are found in the outer part of the atmosphere, but in fact there are not many of them. And because their internal structure is unstable, they are easily catalyzed by other factors. For example, the CFC contained in the air conditioners and some foaming agents we use today can cause ozone depletion.
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Related, due to the creation of the ozone hole, ultraviolet radiation becomes stronger, killing a lot of living things.
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Relatedly, the mass extinction of animals tens of thousands of years ago was caused by meteorites hitting the earth, and it should have produced a large amount of ozone in the process of impact.
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Russian scientists have found that the extinction of dinosaurs 100 million years ago is closely related to the rupture of the ozone hole.
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Of course, human behavior directly leads to the hole in the ozone layer, especially the use of freon as a refrigerant is an important reason for the destruction of the ozone layer, and this is precisely the main operating principle of refrigeration equipment such as air conditioners and refrigerators that we commonly use.
Some synthetic chlorine and bromine-containing substances are responsible for the Antarctic ozone hole, the most typical being chlorofluorocarbons (CFCs, commonly known as Freons) and bromine-containing compounds halon. A growing body of scientific evidence confirms that the destruction of ozone by chlorine and bromine in the stratosphere through catalytic chemical processes is the root cause of the Antarctic ozone hole.
The World Meteorological Organization said on October 6 local time that in recent years, the annual ozone hole over Antarctica has been the largest and deepest ever. The analysis has shown that the void has now reached its maximum range. The 2020 Antarctic ozone hole has been growing rapidly since mid-August and peaked at about 24 million square kilometres in early October.
The cavity now covers an area of 23 million square kilometers, higher than the average of the last decade, and covers much of the Antarctic continent.
1. The effects of the Antarctic ozone hole.
The ozone layer can be said to be a protective layer, which absorbs most of the radiation from ultraviolet rays, and without this layer of protection, then these ultraviolet rays would endanger life on Earth.
In addition, direct ultraviolet rays will cause glaciers to melt, global warming, and sea levels will rise accordingly, and some countries will be submerged ......
2. The season of the ozone hole.
The Antarctic ozone hole occurs mainly from August to November each year, during the spring in the Southern Hemisphere and the summer and autumn in the Northern Hemisphere. This is the season when refrigerators, air conditioners and other refrigeration equipment are frequently used, and the refrigerant chlorofluorocarbons (CFCs) are most likely to enter the stratosphere in large quantities. Therefore, this is the most likely season for the formation of an ozone hole.
Reducing fluorine emissions is an important measure to protect our living environment, and we should use more physical cooling methods and less chemical refrigeration methods as much as possible. Our planet needs everyone's protection.
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Relate. After all, modern industrialized society creates so much waste, which also exacerbates the greenhouse effect, which provides a good environment for the ozone hole to develop.
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Relate. The ozone layer has been damaged by chemicals emitted from human industrial activities, such as refrigeration, air conditioning, agriculture, foam and other industries.
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The Antarctic ozone hole is large and deep, which is caused by the release of chemicals such as freon in human activities, freon is a refrigerant, its main component is chlorofluorocarbons, which have been used in large quantities in previous refrigerators and air conditioners and other products, and will exist in the atmosphere for a long time after release, and when they drift to the ozone layer, free chloride ions will be formed under sunlight, which will destroy ozone molecules, and it will destroy the ozone layer for a long time.
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There must be a relationship. It is the destruction of the environment by humans that the hole in the Antarctic ozone layer is getting bigger and deeper.
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There is a relationship, according to scientists, because people emit too much carbon dioxide to cause the ozone hole.
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Why is no one talking about the hole in the ozone layer, which once made humanity nervous?
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The earth is solid, there is no underground hollow, and the reappearance of those "extinct" animals proves that they are not truly extinct. In recent years, many animals that were once considered "extinct" by scientists have reappeared in front of humans, and many people think that they came out of the underground cavities (Inner Earth)! This statement is inaccurate, after all, the Earth is a solid planet, there is no hollow world inside, and these animals may not really be extinct, but have only been rediscovered in recent years.
1. Scientists have confirmed that the earth is solid, that there is no such thing as a hollow underground, and that it is impossible for animals to live in the center of the earth
I believe that the people of the center of the earth feel that there is a particularly magical hole in the ground, in which there are many prehistoric extinct animals, and even apes and dinosaurs! Unfortunately, this beautiful fantasy does not exist after all. On the question of whether the earth is solid, scientists have confirmed that the interior of the earth is a substantial structure, and there is no so-called underground cavity at all; It is also impossible for prehistoric animals and apes to live together, dinosaurs and humans could not live in peace, and it is impossible to live in the age of dinosaurs.
2. In the history of the development of the earth, there may be some animals who have changed the trajectory of their lives and escaped natural disasters, and they have not been resurrected but have always been there
If underground cavities do not exist, then how did these "extinct" animals appear? They didn't go extinct in the first place, they naturally came out. The extinction of animals is generally based on the fact that a certain area can no longer be found, which can be explained if these animals left the area before human exploration; It may be that a small number of families had already moved to other places before humans explored a certain animal, and it was only recently discovered that it could explain why they were "extinct" again.
There is no underground cavity on the earth, and these "extinct" animals are considered to have changed their habits and survived.
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Some animals that have been proven extinct are still present because their genes may still be in the world, and the underground cavities do not really exist.
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There is no such thing as an underground cavity, and the animals that humans say are extinct are such creatures that have not been seen by humans for several years, and it may be that these creatures are not extinct, but humans have not found them.
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This may exist, and many people don't know what kind of animals are still underground. Some holes can exist, and sooner or later they will be discovered by humans, which is particularly magical.
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For every 1% decrease in ozone in the atmosphere, the amount of ultraviolet light reaching the ground increases by 2%, putting humanity at risk from diseases such as cancer, cataracts, immune system deficiencies, and failure to thrive. At the same time, the increased exposure of ultraviolet radiation can also greatly reduce crop yields, even kill certain fish and marine life, and may expose people living in extreme high latitudes to high-intensity ultraviolet radiation.
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The larger the ozone hole formed in the Arctic, the higher the temperature and the more destructive the environment. Especially people who live at high latitudes can get sunburned if they are exposed to high-intensity UV radiation for a long time.
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The hole in the ozone layer causes ultraviolet light to shine directly on humans. Sunlight has a particularly strong energy, and if there is no ozone layer, human beings will be directly exposed to ultraviolet rays, which will cause various diseases in the human body.
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The ozone hole is directly related to the safety of the biosphere and the safety of human beings, accelerating the melting of glaciers and causing sea levels to rise, and the enhancement of ultraviolet rays induces the occurrence of various diseases, weakening human immunity, damaging eyes, and increasing cancer.
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Harm: Reduce the ability of the ozone layer to absorb ultraviolet rays and increase the incidence of human cancer.
Causes: large emissions of ozone-depleting gases (such as freon-catalyzed ozone decomposition), spacecraft launches, deforestation (the ozone layer is the gradual accumulation of excess oxygen emitted by ancient plants under the action of ultraviolet rays), etc.
Measures: Reduce ozone-depleting gas emissions (e.g. use fluorine-free refrigerators, reduce motor vehicles), extensive greening, and reduce indiscriminate cutting.
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Underground cavities don't really exist. Animals that have been certified extinct will reappear, only because of humans. The cognitive and perceptual domains are limited and cannot fully investigate the existence of these animals.
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does not exist. Because these animals that have been verified extinct may have found hiding places without being discovered by humans, this situation only occurred after they were verified extinct.
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No! It was the moon that entered its current orbit and changed the environment of the earth, and the dinosaurs were eliminated because they could not adapt to the new environment!
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