Characteristics of trees

1. Trees can regulate climate and keep ecological balance. Through photosynthesis, trees inhale carbon dioxide and exhale oxygen, making the air clean and fresh. An acre of forest releases enough oxygen for 65 people to breathe.

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

3. Woods can reduce noise pollution. A 40-meter-wide forest belt can reduce noise10-15db. Noise pollution has caused great harm to human life, study, work and rest, and can be said to be people's "enemy". Therefore, we should pay more attention to afforestation. Noise can also lead to hearing loss, deafness and stupidity, as well as heart, blood pressure and nerve abnormalities in long-term life. Even, it can make people die under long-term noise. In this way, afforestation can reduce noise by four or five times.

The secretions of trees can kill bacteria. There are 34,000 bacteria per cubic meter of air in the open space, and only 3,400 bacteria in the forest. Planting trees is the obligation of every citizen, and the state has designated March 12 as Arbor Day. Planting trees is of great benefit to our study, work and life.

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