Nomadic pastoralism
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Nomadic pastoralism is a farming system where animals (such as cattle, sheep, goats, and camels), are taken to different locations in order to find fresh pastures. It is commonly practiced in regions with little arable land, typically in the developing world. Of the estimated 30–40 million nomadic pastoralists worldwide, most are found in central Asia and the Sahel region of West Africa. Increasing numbers of cattle may lead to overgrazing of the area and desertification. Increased enclosure of land has reduced the amount of land available for this practice.
Nomadic pastoralism was practiced mainly before the Neolithic Revolution. During the revolution, most pre-humans began domesticating animals and plants for food and started forming cities.