Aerial photo of the city of Calama, in the Antofagasta region, Chile. We can see the Loa river crossing the city. The Loa River is the longest in Chile, crossing much of the Atacama Desert.
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concepts: Calama, Atacama, city, desert, cause, agriculture, Chilean, cities, desert, arid, river, rivers, water, oasis, sand, sands, humanity, population, urban, mining city, plantations, mining, drought, Antofagasta , scarcity