How is oxygen produced? According to modern scientific research, there was no oxygen at the beginning of the earth's birth. About 2.5 billion years ago, the earliest plants capable of photosynthesis appeared. After that, the carbon dioxide in the air was converted into oxygen through photosynthesis, and the atmospheric structure of the earth also changed.
Until today, plants are still the "oxygen generator" of the earth, especially the lush tropical rain forest, which is called the "green lung" of the earth, such as the Amazon rain forest in South America.
What is the Amazon rainforest?
This is a very mysterious place with many animals and plants. According to the data, the Amazon rainforest spans 9 countries in America, accounting for 20% of the global forest area, and is the largest tropical rainforest in the world.
For ordinary people, it's complicated. Once you enter the depths of the rainforest, there is basically no turning back. Therefore, the Amazon rainforest is also known as the "forbidden zone for human beings". However, for explorers and scientists, it is a natural treasure house on the earth.
At present, 65,438+00% of the known species on the earth live in the Amazon rainforest, and this is only a small part of what people know about it. Every year, new animals and plants are discovered in the Amazon rainforest. It can be said that the deeper the rainforest, the more unknown life there is.
Why is the Amazon rainforest so terrible? This is because the area here is too large and the plants are lush, and it is easy to get lost after going in. Besides, there are many poisonous animals and plants here. If you are not careful, you may be caught and die here.
Seeing this, you may be curious. In the Amazon rainforest, there shouldn't be any humans living here. After all, it's horrible here, but it's not. There are people's lives here, too
The mysterious man in the Amazon rainforest
Let's first look at an archaeological report about the Amazon rainforest published by the British Guardian on 20 18. The researchers found that there are a large number of ancient human settlements here, and from the quantitative point of view, in addition to the already discovered 8 1 human settlements, there may be hundreds of human settlements, or even more human settlements waiting for archaeologists to discover.
This also shows that although it is terrible in the eyes of modern humans, it may be one of the preferred habitats for humans in a certain period in the past. Judging from the number of these settlements, at least millions of people may live in the Amazon rainforest.
From the time point of view, it seems that human beings have been living here for thousands of years before the Amazon rainforest. From the scale point of view, there used to be a large number of villages dotted here, and there may even be towns, but later, for some unknown reasons, it was gradually abandoned by human beings.
Of course, in today's Amazon rainforest, there are also humans living here. For example, the Iron Lions are primitive aborigines who live here. They not only have a unique agricultural culture here, but also live a self-sufficient life. It can be said that in the eyes of outsiders, these "mysterious people" are out of touch with modern society, but in fact their lives are also very happy, just like the "Peach Blossom Garden".
According to the data, the iron lion people living in modern society can also see the shadows of many primitive humans. For example, they spend 90% of their time every year on activities and work, regardless of gender. Like primitive people, iron lions get food by hunting and gathering every day.
In addition to the iron lion people, there are other primitive tribes living in the Amazon rainforest. They are even more isolated than the iron lion people.
However, with the influence of modern human activities, whether many primitive tribes can last forever is also threatened. For example, in recent years, the fire in the Amazon rainforest has caused many primitive tribes to abandon their homes and venture deep into the tropical rainforest to find new homes.
Some friends may wonder, since primitive life in the tropical rain forest is very inconvenient, why don't these indigenous people come to modern society, but venture into the depths of the rain forest?
As mentioned above, in fact, these indigenous people living in the Amazon rainforest have long been out of touch with the lifestyle of modern humans, which also leads to their inability to adapt to modern society at all. So for them, it is safer to be in the depths of the rainforest with all kinds of "poisonous beasts" than to enter the modern society.
Will the Amazon rainforest disappear?
When did humans start to destroy the Amazon rainforest on a large scale? The answer is that since human beings entered the primitive farming era.
In order to carry out agricultural production, at the same time, in order to build houses and obtain more land, human beings cut down the Amazon rainforest on a large scale, which also led to the continuous destruction of the natural ecological environment of the rainforest. It can be said that in the past 10,000 years, due to the impact of human activities on the Amazon rainforest, the area of the Amazon rainforest has been shrinking all the time.
Especially in recent years, several fires have put the Amazon rainforest in jeopardy, and may even change the global climate environment, including the early extinction of many animals and plants, including many animals and plants that we have not yet discovered, which disappeared ahead of time because of human influence before being discovered by humans.
Some researchers believe that by the end of this century, the Amazon rainforest will disappear and become a grassland. With its disappearance, the global greenhouse effect will enter an uncontrollable situation, which will lead to the "no return" of mankind.
It must be said that human beings are paying a huge price for their destruction of the natural environment over the years. What do you think of this? Do you think human beings "deserve it"?