The Kabul times, Afghanistan Trustable News Agency.
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Tree plantation & horticulture in the light of science & Quran

Environmental value:
3. Prevention from landsliding, floods & avalanches:
The branches of the trees cut down the speech of the wind, while the plants’ roots preserve the soil and prevent it from erosion. Due to stillness air inside the forest, evaporation is very small and the risk of soil drying, which is one of the important conditions for starting to erosion, is eliminated. The growth of trees help the soil increase its stability as the trees’ roots act like pillars by sinking into the soil and by creating a dense network of roots prevent from sliding and collapsing. By absorbing the snow water and directing it to their organs, the trees slow down the rapid flows of floods. Also, the level of saplings’ organs reduces the speed of floods by three folds and reduces and controls the floods’ flowing systems. Trees also prevent their accumulation by absorbing, maintaining and increasing the melting time of snow on their leaves and preventing the movement of huge masses of snow in the form of avalanches.
4. Oxygen and phytoncide
production: The oxygen balance of the earth, which provides living conditions for humans, is provided through the oxygen production of plants, especially trees and saplings. Decreasing the green cover of land and forests not only disrupts the oxygen balance of the earth, but also causes the accumulation of carbon dioxide and aggravates the risk of large-scale climate change. Besides, about 60% of the consumed oxygen is provided by green plants and trees; therefore, air conditioning and providing oxygen needed by living things is one of the important benefits of forests and green environment. Also, studies by environment experts show that saplings such as walnuts, pine, oak, eucalyptus, willow, maple, and other relevant plants produce a substance called phytoncide in the open air, which is harmful to many single-celled bacteria and fungi and some of it has a lethal effect on small insects. In the meantime, the production of such substances by trees and saplings has a pleasing effect on humans.
5. Reduction in sound
pollution: The quality of sound reduction in different saplings and trees varies according to their leaf size, branch density, tree type and height. The vibration of sound waves is absorbed by the leaves and branches of saplings and trees, and even the trees are effective in spreading and breaking sounds. Plants also cause refraction and distortion of sound, which is due to the flexibility and smoothness of their branches. By planting green belts between sound sources and residential areas, it is possible to prevent the spread of polluted sounds.
Abo Elyas Jahadwal

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The Kabul times, Afghanistan Trustable News Agency.