It's very usefulEarth's environment caused by nature. Degradation is caused by decay and break down of the different types of rocks using a very long time. Rocks disintegrate, there are a variety of sizes, this corrosion when combined with water, air, plants, animal carcasses, carcass made of soil texture, which these components are much less varies according to the type of soil. By taking advantage of human resources, Earth to life.
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