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Quote from the BBC article:
"“Without livestock, life in certain environments would likely become impossible for some people,” Phalan says. That especially includes nomadic groups such as the Mongols and Berbers who, stripped of their livestock, would have to settle permanently in cities or towns – likely losing their cultural identity in the process."
Comment from me: Only 3 million Mongols currently live a nomadic life. We are talking about a tiny fraction of the world's population.
Link:
Urban nomads: Mongolian herders battle new future as leave the land for the city