The following article is selected from Baidu Encyclopedia.

1. Trees can adjust the weather and keep the balance of the ecosystem. Trees breathe in carbon dioxide and breathe out oxygen through photosynthesis, making the air fresh. An acre of forest gives off enough oxygen for 65 people to breathe.

2. Trees can prevent wind and fix sand, conserve water and soil, and absorb all kinds of dust. One acre of forest can absorb 20-60 tons of dust a year. ..

3. Forests can reduce noise pollution. A 40-meter-wide forest belt can reduce noise 10- 15 decibels. Noise pollution has done great harm to human life, study, work and rest ... and so on. Can be regarded as the "enemy" of the people. So we should even pay attention to afforestation. Noise can also weaken, deaf, stupid, heart, blood pressure, nerves ... and so on. An exception occurred. It can even make people endure the long-term suffering of death in the long-term noise. In this way, planting trees for afforestation can reduce noise by 4-5 times.

The secretion of trees can kill bacteria. There are 340,000 bacteria in the air per square meter in the open space, and only 3,400 in the forest.

Afforestation is the obligation of every citizen, and the state also specially stipulates that March 6, 438+02 is Arbor Day. Afforestation is of great benefit to our study, work and life ... and so on ..

Afforestation can purify the air, beautify the environment and green the motherland. It can also make oxygen for people to absorb and inhale the carbon dioxide exhaled by people. If a large number of trees are not planted, the oxygen on the earth can hardly meet the needs of human beings and all kinds of creatures.