The presence of trees is not only for beauty and aesthetics but in general, has two main necessities. The first is to provide water, maintain soil and water and regulate the climate.

The vegetation acts first and foremost as a windbreak and protector of the ground. A little observation will show that when heavy rains come, where there is vegetation there is often a clear and thorough spring, and the vegetation obviously acts as a sand-fixing and filtering agent, whereas where there is no vegetation, sediment.

While it is true that sediment absorbs water, if it is not held in place by vegetation on its surface, it can easily be washed away by water, causing soil erosion and flooding. When large amounts of sand-laden water or debris flow into the riverbed, it can easily cause silting up of the riverbed and flooding.

Another role of vegetation is to regulate the climate and increase rainfall. No plant consumes water, even though typhoons bring as much water from the oceans every year, but whether and how much rain falls is also related to the temperature of the ground and the humidity of the air.

If the humidity of the air on the ground is high, it is easy to form rain once it cools down, but if the humidity of the air is low, not only will it dilute the moist air, but even if it does fall, it may evaporate in the air before it reaches the ground, thus making rainfall scarce. Rainfall is thus sparse.

Only an abundance of vegetation can distribute water evenly and continuously, keeping the air moist and thus regulating the climate.

Therefore, the ecological balance of the earth and the living environment of human beings are at stake.

1. Indiscriminate felling will destroy the biodiversity of the forest, and many organisms will lose their original habitat and become endangered.

2. Indiscriminate felling can homogenize local species and reduce their ability to resist pests and diseases, for example, pine caterpillars are prevalent in areas with more plantations.

3. Deforestation reduces the ecological regulating function of forests and reduces their ability to purify the air.

4. Forests play an important role in maintaining water and soil, and indiscriminate deforestation can increase soil erosion. Deforestation can lead to desertification, soil erosion, and natural disasters such as sandstorms and tornadoes.

So why do people continue to cut down trees when they know how important they are to humans?

The main reasons why trees are cut down are

1. To make paper.

2. To make furniture, chopsticks, and other major household items.

3. To make industrial products such as wooden floors, plywood, and suspended ceilings.

It can be seen that the purpose of cutting down trees is for commercial gain. With the development of commercialization gradually sweeping the whole society, profit has become the object of people's pursuit, and the concept of natural ecological balance has been abandoned by people.