An aerial view shows pools of mineral-coloured water gathered in holes dug on salt flats on the Senegalese coastline near the border with [Gambia] June 12, 2006. [Women] collect salt by hand into 50kg (110lbs) sacks, which sell for about $2, and are traded with neighbouring [Gambia and Mauritania, where the salt is mainly used for preserving fish in areas without electricity. ]