What influence do trees have on human beings?

1. Trees can regulate climate and keep ecological balance. Through photosynthesis, trees inhale carbon dioxide and exhale oxygen, making the air clean and fresh. More than 60% of the oxygen in the air comes from trees and green plants on land. Therefore, people compare trees and green plants to "oxygen factories" and "fresh air treatment factories". One acre of trees releases enough oxygen for 65 people to breathe for a lifetime.

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 to 60 tons of dust a year;

3. Forests can reduce noise pollution, and 40-meter-wide forest belts can reduce noise from 10 to 15 decibels, and can also absorb toxic gases emitted by industrial production, intercept dust and dust that pollute the atmosphere, and eliminate noise pollution harmful to human beings.

The secretion of trees can kill bacteria. There are 30,000 to 40,000 bacteria per cubic meter of air in the open space, and only 300 to 400 in the forest;

5. Trees can lower the temperature and increase the humidity. In hot summer, people will feel cool in the shade of trees. This is because the green leaves in the dense tree crown can block the sun, and people can obviously feel that the temperature in the forest is lower than the surrounding area.