After trees are removed, the soil is exposed and essential nutrients are washed out of the soil all-together. This leads to soil erosion. As of now, about 80% of the soils in the humid tropics are acidic and infertile. When there are no trees to keep the soil in place, the soil becomes ripe for erosion. It dries and cracks under the sun’s heat. Once the soil temperature exceeds 25 degrees centigrade, volatile nutrient ingredients like nitrogen can be lost, further reducing the fertility of the remaining soil. Furthermore, rainfall washes remaining nutrients into rivers. This means that replanting trees will not necessarily help to solve the problems of deforestation; by the time the trees have matured, the soil might be completely stripped of essential nutrients. Eventually, cultivation in the forest regions will be impossible, and the land will be useless.
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