A few days ago, my uncle and aunt sent some potted flowers and some trees. Bonsai is placed at the door, living room, room and balcony. I said to my father, "We have a botanical garden at home. Why do we have so many plants? " Dad smiled and said, "Plants can create an atmosphere and purify the air. People and animals cannot do without them. " People or animals cannot live without plants? Why can't people or animals live without plants? I'll be skeptical. Decided to do a few small experiments to prove the problem.
On Sunday, I bought two hamsters. These two poor hamsters will be my guinea pigs. They have been struggling, and the round disposable film tablecloth stared at me with small eyes. I put the first hamster in a big glass fiber reinforced plastic, and sealed the glass tightly for fear that the air in the bottle would communicate with the outside air. I watched carefully and saw the hamster running fast along the tank wall and around the bottom of the tank. Hey, isn't the mouse alive and well? Isn't it true what dad said? However, within a few minutes, I saw the hamster circling more and more slowly until it was stagnant and dying. Suddenly, I gently opened the plastic wrap, took out the first hamster, put in the second hamster and moved into four pots of leafy plants. Then I gently covered it with plastic wrap, and I saw hamsters scurrying around in a flurry. After a long time, I don't want to die. This experiment proves that plants can transport the oxygen needed by animals, and also proves that the earth can't live without plants.
In order to further prove the dependence of animals on plants. I came to a feed processing factory near our home. The air there is full of dust noise, which makes me cough. I feel very uncomfortable. Then, I ran to a bamboo forest behind our house. It is a place with fresh air, and I feel extremely refreshing. This experiment proves that plants can purify the air. Let people breathe smoothly.
These two experiments prove that the survival of human beings and animals is closely related to plants. How scientific is this? I also searched online and summarized the following points: ① People must rely on plants to provide oxygen, and only plants can make oxygen. If a person can live without food or drink for several days. If you don't breathe oxygen for a few minutes, you may die. Oxygen is the first need of human life activities! An adult breathes about 20,000 times a day, inhaling 0.75 kg of oxygen and exhaling 0.9 kg of carbon dioxide. (2) Breathing of animals and plants and burning of substances also consume oxygen and release carbon dioxide. So, isn't there more oxygen in the air every day? Don't! The reason why there has never been such a crisis between heaven and earth is that plants are both "factories" of natural oxygen and "broad markets" of carbon dioxide. According to statistics, 1 hectare of broad-leaved forest can produce 750 kilograms of oxygen and eat 1 1,000 kilograms of carbon dioxide every day during the growing season. Therefore, as long as there are 6,543,800 square meters of trees, it can supply a person with oxygen demand and absorb exhaled carbon dioxide. Because there are plants that constantly supplement oxygen, the oxygen in the air can be kept basically constant. On the contrary, if there are no plants, the oxygen on the earth can be used up in about 500 years.
Therefore, human beings and animals can sustain life, and the oxygen needed for activities must be attributed to green plants. Plants are closely related to our human and animal lives. Here, I call on people in the whole society to stop cutting down plants and make them our best friends.
I also thought of Biosphere 2. There were plants in Biosphere 2, but it failed. I looked it up on the Internet, and it turns out that there are no animals in Biosphere 2, so it can be seen that animals and plants are interdependent. The earth is actually a big biological chain. Plants are producing, animals are consumers, and bacteria and fungi are decomposers. In this chain, we are interdependent, and no one can live without anyone. So we should take good care of animals and plants. Now the earth is our only home, so we should take good care of it.