Definition: Aridities are conditions that cause soil to be dry, barren, or devoid of vegetation in a region or climate where water scarcity is severe. They often occur in arid regions, which means areas with little or no rainfall due to lack of moisture sources like rivers and lakes. Examples include the deserts of Africa and South America where soil remains dry for long periods without rain, or the Sahel region in West Africa where the land is covered by sand dunes.
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