Why is the earth getting more carbon dioxide and less oxygen?

Humanity is now the entire solar system.

and his evolution was only planned in tens of thousands of years, from apes to humans. However, in recent years, the interior of the earth has been constantly changing, and the earth in which humans live has undergone earth-shaking changes, and the reason for this is due to the use of nature by human beings. Especially on Earth carbon dioxide.

More and more, but less and less oxygen on this aspect. There are several reasons for this. <>

First, the increasing amount of carbon dioxide is caused by the continuous emission and use of resources. First of all, there will be more and more carbon dioxide in particular, precisely because people are interested in fossil fuels.

Some of the pollutants in the air caused by the exploitation and utilization of the air are gradually, especially in the ozone layer of the Arctic and Antarctic regions, where people continue to emit carbon dioxide and acid gases and fluorine gases.

and so on. As a result of the continuous emission of these gases, human beings feel that the earth is getting hotter and hotter, and some glaciers in the earth's interior are also melting. Therefore, it is said that human beings will feel a devastating change in the earth in the future or in the near future.

Second, forest resources are constantly being destroyed. Secondly, there is the relationship between carbon dioxide and oxygen, which plants can use to absorb carbon dioxide and thus produce oxygen. In recent years, oxygen has been getting smaller, and carbon dioxide is gradually increasing.

Humans are constantly exploiting forest resources, especially in the Amazon rainforest, the "lungs of the earth".

In recent years, one of its forest covers has been decreasing, and the main reason for this is the continuous deforestation of the forest area. And human beings cut down these forests just to meet their daily needs. <>

3. To balance the two, humanity needs to make more efforts. Finally, carbon dioxide and oxygen are the necessities of human production and life on the earth, and after oxygen is inhaled into the lungs, it is converted into carbon dioxide and discharged into the air. Then the importance of oxygen can be imagined, so in the future, oxygen must be improved by human beings.

This phenomenon is due to the fact that human factories now release carbon dioxide, and there are fewer and fewer plants that can release oxygen.

Because humans are emitting more and more carbon dioxide and many plants are dying out, there is less and less oxygen.

This is due to the fact that human activities are constantly consuming oxygen and producing carbon dioxide.

In the early days, there was no oxygen or carbon dioxide on Earth.

The concentration can be as high as 98%, and this statement is correct, which is explained as follows:

Because there was no oxygen in the atmosphere of the early earth, life at that time was anaerobic, for these creatures, oxygen is really "poison", but for the vast majority of life on the earth now, oxygen is an indispensable necessity, saying that oxygen is a "chronic poison" is just grandstanding, if there is no oxygen, now life on the earth is still a simple structure of archaea!

So, what happened to cause oxygen to begin to appear in the Earth's atmosphere?

The simplest and most direct reason is that there is a creature that has evolved a unique skill "photosynthesis, cyanobacteria."

This organism is a primitive prokaryotic life, but this organism can do photosynthesis, and cyanobacteria do not have chlorophyll.

But they can still do oxygen-based photosynthesis.

The emergence of cyanobacteria has made the earth collapse from oxygen-free and hypoxic to the modern earth with sufficient oxygen content, and the emergence of oxygen is one of the basic factors in the complexity of life, as evidenced by the fact that eukaryotic life is generally larger than prokaryotic life.

In addition to cyanobacteria, there were some environmental changes that took place before the Earth fought back, and there was a lot of "methane" in the ocean mold at that time.

bacteria", these bacteria release methane in the process of metabolism, and the appearance of methane inhibits the increase in reducing oxygen, and at the time of the great oxidation event, the element nickel in the Earth's strata.

Dramatically reduced, these nickel elements are extremely dependent on methane bacteria, so it's not just cyanobacteria that are releasing oxygen and greenhouse gases.

It is also relatively reduced, providing a more suitable basis for the increase of oxygen.

With the continuous improvement of our living standards, people's concept of life has begun to have a certain change, and now there are many people who will choose some relatively low-carbon travel methods for environmental protection, such as taking public transportation, etc., so the so-called carbon in low-carbon life refers to the most common carbon dioxide in our lives, many people think that carbon dioxide is a greenhouse gas, and there are only disadvantages to our environment, so is it really a good thing to have more oxygen? Scientists said: Then you have never seen what the earth is like when there is a surplus of oxygen.

According to scientists, hundreds of millions of years ago, before human beings appeared, the earth experienced many special periods, including a period of excessive oxygen content and excess on the earth. During that period, plants on the earth grew wildly, and then released a large amount of oxygen under photosynthesis, and the earth at that time can be said to be completely encapsulated in oxygen. Seeing this, some people must wonder, isn't it good to have more oxygen?

Now it is the amount of carbon dioxide that causes the greenhouse effect, and it stands to reason that more oxygen should be more conducive to the survival of animals and plants.

That's right, high oxygen content is conducive to the survival of animals and plants, so at that time the earth was everywhere in the enlarged version of various animals and plants, now many people will be startled when they see spiders, that is, you have never seen a spider bigger than a person. At that time, the plants were also very large, they were constantly absorbing carbon dioxide, and then releasing a large amount of oxygen, so the earth at that time can be said to be "full of life" like never before.

Under this vicious circle, we humans could not be born at all, so the ecological environment at that time made its own adjustments, that is, the so-called biological chain, a large number of herbivores appeared, herbivores ate most of the plants, and then carnivores ate herbivores, so that after a long time, the oxygen content on the earth-air counting ball gradually dropped to normal levels. Therefore, it is an eternal truth that things must be reversed, whether in life or in the ecological environment, whether in ancient times or in modern times.

The reasons for the decrease in carbon dioxide in the primordial Earth's atmosphere are: the formation of chalk rocks, the formation of coal, and the formation of oil

Since the beginning of life on Earth, the amount of carbon dioxide in the atmosphere has fluctuated, ranging from high to low, and there is no single trend. Today, the level of carbon dioxide in the atmosphere is historically low-to-medium.

4.6 billion years ago, the Earth was born. 3.5 billion years ago, life appeared. Three million years ago, humans walked upright. We look at the evolution of the atmosphere from the birth of the earth.

Atmospheric evolution. The evolution of the Earth's atmosphere has gone through three stages.

1. Primitive atmosphere: 4.6 billion years ago.

The primordial atmosphere was composed of nebula gases, mainly hydrogen, and possibly simple hydrides such as water vapor, methane, and ammonia, similar to today's gaseous planets Jupiter and Saturn.

2. Secondary atmosphere: 4.5 billion years ago - 2 billion years ago.

The gas produced by volcanic eruptions, the gas produced by asteroids hitting the Earth, forms the second stage of the atmosphere, which is mainly composed of nitrogen, carbon dioxide, and noble gases. Most of the carbon dioxide dissolves in water and reacts with calcium and magnesium metals to form carbonate rock deposits.

As early as 4 billion years ago, the basic characteristics of the carbon cycle were established.

3.4 billion years ago, the main part of the secondary atmosphere was: nitrogen.

3. Present atmosphere: 2 billion years ago to the present.

Life appeared 3.5 billion years ago, and until 2.5 billion years ago, there was no oxygen in the atmosphere. From 2.5 billion years ago to 100 million years ago, life was large**, and algae such as cyanobacteria, which produce oxygen, flourished, and oxygen increased dramatically.