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There are a few ways: 1. Over-grazing by livestock takes away vegetation. The land then turns from grassland to desert. 2. The desert ground is then blown by winds and after some time we get sand dunes etc. 3. Water flowing down a hill or mountain cuts into the soil to make ravines and crevices, eventually making canyons. This is done when the water picks up sand particles. These particles rub against rock and gradually grind them away.

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16y ago

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