On Bolivia's Salar de Uyuni, a vast white salt flat that feels almost otherworldly, Karina Quispe is watching from the sidelines a global resource race for the world's largest - and almost untapped - trove of battery metal lithium.
Her village on the edge of the salar - from where most of the men have migrated to Chile to find work - has so far seen few jobs or benefits from the mineral wealth beneath the plains.
