China Naming Network - Eight-character lottery - What role does lawn play in the environment?

What role does lawn play in the environment?

Lawn, as a public green space with many functions, such as reducing noise, providing places for leisure sports, and conserving water and soil, plays an irreplaceable role in maintaining ecological balance, beautifying living environment and developing sports.

(1) promotes energy conversion. Grass can convert solar energy into bioenergy. According to scientists' calculations, the "energy" absorbed by 700 mu of grass from the sun every day is similar to the "energy" released by an ordinary-sized atomic bomb. In order to solve the increasingly serious energy crisis, countries all over the world attach great importance to the development and research of green energy.

(2) Purify the air. Lawn can absorb harmful gases such as sulfur dioxide, hydrogen fluoride, ammonia and chlorine, and prevent and reduce the harm of these harmful gases to human body. Grass leaves are thick and rough, and some have a lot of fluff, which can retain, filter and adsorb dust, smoke and dust in the air. According to the measurement, the dust absorption capacity of lawn is more than 70 times stronger than that of bare land, and the dust content in the air above lawn is only 20% ~ 30% of that above bare land.

(3) Balance the ecology. Grass can absorb carbon dioxide, release oxygen, ensure the balance of oxygen and carbon dioxide in the atmosphere, and keep the air fresh.

(4) Adjust the temperature. Lawn plants can evaporate a lot of water during their growth, which can make the lawn ground warm in winter and cool in summer. In summer, the temperature of high-rise wall, asphalt pavement and cement pavement near the sun is 4℃ ~ 4.5℃ higher than that near the lawn. In winter, the temperature of lawn ground is 4℃ ~ 6℃ higher than that of asphalt pavement.

(5) Adjust the humidity. About 4.25 tons of water evaporates on 1 mu of lawn every day. If the growth period of grass is 100 days, it can evaporate 425 tons of water and increase the relative humidity of air by 5% ~ 9%. So in the lawn area in summer, it will make people feel particularly fresh and sweet.

(6) prevent runoff. Grass has developed roots, some of which are very long, even as long as 1 mile, which can firmly grasp the soil and prevent soil erosion.