Why does the earth have a climate system suitable for life?

Can you think of life and climate? For millions of years, the climate of the earth has been determined by the struggle between the animal kingdom and the plant kingdom, the two life kingdoms of the earth. Animals breathe in oxygen and exhale carbon dioxide, while plants breathe in carbon dioxide and release oxygen. Carbon dioxide is a greenhouse gas. So it can be concluded that animals can warm the earth and plants can cool it. If which side has the upper hand, then the earth will face the greenhouse effect or another severe cold period. During the CAMBRIAN Big Bang more than 500 million years ago, the earth was occupied by various creatures. At that time, the soil was full of arthropods that released carbon dioxide into the air, making the carbon dioxide content in the air as high as 20 times today. At that time, the climate was extremely warm. However, the plants quickly fought back. Fossils show that 450 million years ago, lignin appeared for the first time in plants containing lignin, which hardened the cell wall and made plants grow up, and the first trees appeared on the earth. With the unprecedented growth of plants in the world, unconstrained photosynthesis makes plants absorb carbon dioxide from the air, which greatly reduces the content of carbon dioxide, but hungry arthropods who can't absorb lignin can do nothing about it-the earth has entered a cold period. Animals fight back again through further evolution. The protagonists at that time were termites and dinosaurs, who learned how to eat lignin and how to reproduce. Their heavy breathing and the destruction of vegetation have made the carbon dioxide content in the air as high as three times that of today, and most parts of the earth are hot and humid, restoring the greenhouse effect. However, the plants were not destroyed. 65 million years ago, after dinosaurs completely lost water due to asteroid collision or other disasters, plants seized this opportunity, and the breakthrough point was the emergence of the first grasslands. Grass itself stores little carbon dioxide, but it can form soft soil. Soft soil can store a lot of carbon dioxide, thus reducing the carbon dioxide content in the air. In fact, grassland ecosystem contains more carbon than forest ecosystem. In the past 40 million years, a large number of grasslands have spread all over the world, replacing forest areas many years ago. Under the influence of grassland, the earth gradually cooled down and finally entered the ice age 2 million years ago. About 654.38 million years ago, due to the remarkable enhancement of human activities, the carbon dioxide content in the earth's air rose again. Especially in the last hundred years, the greenhouse effect of the earth has become more and more obvious. Perhaps, the whole biosphere on the earth, just like the well-known biological individual regulates its internal environment, constantly regulates the atmospheric environment of the earth, making the climate meet the needs of biological evolution on the earth. In other words, the earth's biosphere actively adjusts the environment, not passively adapts to it. If so, billions of years of climate change is not only the cause of the sun or the earth, but also the deep participation of creatures for their own interests. (Selected from Big Technology, No.3, 2002, with changes) 7. According to the content of the article, briefly describe the relationship between climate and life. (3 points) For example, life and climate co-evolved. Or: climate is determined by the struggle between two living systems. Or: animals have the upper hand and the earth has a greenhouse effect; Plants prevailed and the earth entered a cold period. Scoring standard: if you answer one of them correctly, you will get 3 points. 8. Please write the order of this article. What does this order have to do with description? (3 points) Answer the examples in chronological order. The content of this paper is the co-evolution of life and climate, and the premise of evolution is the passage of time. Scoring standard: Answer the first question and get 1 point; Answer the second question and get 2 points ***3 points. 9. What is the reason why the word "true" added in the last paragraph of this article cannot be deleted? (3 points) The answer example "is true" shows that if the former viewpoint is established, the latter result can be produced. So it can't be deleted. Scoring standard: you can get 3 points if you answer correctly. 10. according to the content of this article, mobilize your own knowledge accumulation, talk about how the earth's climate may change in the next few years, and briefly explain the reasons. For example, the greenhouse effect has been controlled, and the rate of temperature rise has slowed down. Humans have fully realized the harm of the greenhouse effect and started to take a series of measures to control it. Or: the greenhouse effect intensifies and the temperature rises further. Human activities increase and vegetation decreases. Or: the greenhouse effect and the severe cold period alternate. Mainly depends on which side of animals and plants has the upper hand.