Peasants rest in Machacamarca, Bolivia, on June 30, 2021, after working in the elaboration of chuno (dehydrated potato). - From the Aymara word "ch'unu", this ancestral method of uncertain origin, also used in Peru, allows potatoes to be stored for decades without losing their nutritional properties: carbohydrates, fibre, vitamins and minerals. (Photo by AIZAR RALDES / AFP)