With estimated 9,000,000 t , Bolivia holds about 43 % of the world 's known lithium reserves ; most of those are in the Salar de Uyuni .
Of those , lithium is arguably most important as it is a vital component of many electric batteries .
With estimated 9,000,000 t , Bolivia holds about 43 % of the world 's known lithium reserves ; most of those are in the component     .
Of those , lithium is arguably most important as it is a vital component of many electric batteries .