Afar workers at the salt mines, Afar region, Dallol, Ethiopia [Getty Images]

DALLOL, ETHIOPIA - FEBRUARY 25: Afar workers at the salt mines, afar region, dallol, Ethiopia on February 25, 2016 in Dallol, Ethiopia. (Photo by Eric Lafforgue/Art in All of Us/Corbis via Getty Images)

Corbis News Eric Lafforgue/Art in All of Us