What day is today? Today is Arbor Day. What are the benefits of planting trees?

1, afforestation can prevent diseases. Leaves, buds, flowers and fruits of plants can secrete aromatic and volatile fungicides, and some forest plants can kill bacteria by releasing oxygen ions.

2. Afforestation can reduce noise. The absorption of sound waves by branches and leaves is also beneficial to eliminate noise. Planting trees on urban streets can also reduce noise by 7- 10 decibels.

Afforestation can adjust the climate. The dense canopy blocks the solar radiation, and the temperature under the shade in summer is about 10 degrees lower than that in the open field, and it is 2-3 degrees higher in winter.

In the city, a tree can store the pollutants emitted by a car driving for one year 16 km. Many trees can absorb harmful gases, such as 1 hectare Cryptomeria fortunei forest, and can absorb 60 kilograms of sulfur dioxide every day. Others, such as Ailanthus altissima, oleander, Ginkgo biloba, Sycamore, etc., all have the function of absorbing sulfur dioxide. When the urban green area reaches more than 50%, the pollutants in the atmosphere can be effectively controlled.

Urban forests can increase air humidity, and an adult tree can evaporate 400 kilograms of water a day, so the air humidity in forests is obviously increased. According to calculation, the local summer temperature can be reduced by 0. 1% for every increase in urban green area.