How do human activities caused for desertification?
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Human activities that contribute to desertification include the expansion and intensive use of agricultural lands, poor irrigation practices, deforestation, and overgrazing. These unsustainable land uses place enormous pressure on the land by altering its soil chemistry and hydrology. Eventually, overexploited drylands suffer from erosion, soil salinization, loss of productivity, and decreased resilience to climatic variations. Land management plays a particularly large role in highly populated regions of less developed countries, where population growth is placing increased pressures on marginal lands. Global warming due to the atmospheric buildup of carbon dioxide and other gases emitted by fossil fuel combustion threatens to complicate this picture in the future. A rise in global temperatures is likely to accelerate the process of desertification as evaporation rates increase.
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Here is ur answer....
Human activities that contribute to desertification include the expansion and intensive use of agricultural lands, poor irrigation practices, deforestation, and overgrazing. These unsustainable land uses place enormous pressure on the land by altering its soil chemistry and hydrology. Eventually, overexploited drylands suffer from erosion, soil salinization, loss of productivity, and decreased resilience to climatic variations. Land management plays a particularly large role in highly populated regions of less developed countries, where population growth is placing increased pressures on marginal lands. Global warming due to the atmospheric buildup of carbon dioxide and other gases emitted by fossil fuel combustion threatens to complicate this picture in the future. A rise in global temperatures is likely to accelerate the process of desertification as evaporation rates increase.
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ramya226:
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