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Bolivien, Alti Plano, Salar de Uyuni, near Colchani, Draussen, Arbeiter fuellt Treibstoff nach, aus der Serie "SALAR", Suedamerika, Januar 2011 Engl.: Bolivia, Alti Plano, Salar de Uyuni, near Colchani, a worker in the salt, from the series "SALAR", South America, January 2011, Salt desert, truck, outside, mask, fuel, engine, gasoline, close up, detail, can, canister II In the South West of Bolivia lies the „Salar de Uyuni“, a vast salt flat at an elevation of 3, 656 meters. The crust serves as a source of salt and covers a pool of brine, which is exceptionally rich in lithium. It contains 50 to 70% of the world‘s lithium reserves. Lithium, a key resource for the battery industry, is a strategic asset for the technology development. This photograph shows a worker who's job it is to scratch salt from the surface of the salt flat, to dry and finally sell it in the village of Colchani. Fuel is a rare good in the Andes. (KEYSTONE/LAIF/Daniel Hofer)