Page 30 - The Periodic Table Book

Hundreds of artificial ponds dot the hillside near the small town
SALT FLATS of Maras, high in the Andes of Peru. The ponds fill with water
from a stream that runs down from the nearby mountains. In the sunshine, the water evaporates,
leaving behind a thick salt crust that can be collected. The people of Maras have been gathering
salt in this way for at least 500 years.

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