What is Desertification ?!?!?!?!?
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The United Nations' official definition says desertification is land degradation in typically dry areas resulting from various factors, including climatic variations and human activities. ... Many things can cause desertification. Drought, overgrazing, fire, and deforestation can thin out vegetation, leaving exposed soil.
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In a row of trees a tree is 7 from left end and 14 from right end how many trees are there in the row?
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