What is the function of street trees? What changes have they made to people's lives? What are their benefits to the earth and mankind?

Street trees are trees planted on both sides of the road and in the isolation belt to shade vehicles and pedestrians and form a street view. Street trees have many functions, such as supplementing oxygen, purifying air, beautifying the city and reducing noise.

The value of street trees:

Supplementing oxygen and purifying air: street trees can carry out photosynthesis, absorb carbon dioxide and release oxygen; The leaves of trees can adhere to and intercept floating dust, which can prevent the deposited pollutants from being blown up by the wind, so it has the function of purifying the air. According to research, the maximum amount of floating dust deposited on tree leaves can reach 30 to 68 tons per hectare, which can reduce air pollution.

Adjust the local climate: the crown of street trees can intercept, reflect and absorb solar radiation, and also absorb hot air through evaporation of trees, thus adjusting the temperature in summer. In addition, the evaporation of water in trees can increase the relative humidity; The influence of circulation makes the cool and clean air in the suburbs of the city flow into the urban area, which improves the climate.

Reduce noise: Noise is one of the public hazards in the city, which not only makes people nervous, easy to fatigue, affects sleep, but also seriously harms the hearing organs. Street trees can eliminate part of the noise through the sounds made by the trees themselves (swaying and rubbing of branches, stems and leaves) or wild animals (birds and insects) living during the period, or just shield the noise source to achieve the psychological feeling of reducing noise.

Beautify the city: the buildings on both sides of the city road are dark and cold in color and thick and hard in lines. Walking in it is like being in a concrete jungle, and the trees on the street are tall and graceful, which can beautify the environment, soften the stiffness of cement buildings and add beautiful scenery to the city.

Shading: In hot summer, street trees can block the radiation of the scorching sun and protect pedestrians from the sun.

Precious local cultural assets: a boulevard cultivated for decades and years. It is a weather-beaten and timeless historical witness, which is closely related to the development and life of human society. Its planting background, deeds and local characteristics are one of the most precious local cultures.