(FILES) This file photo taken on May 23, 2016 shows a child and a woman breaking rocks extracted from a cobalt mine at a copper quarry and cobalt pit in Lubumbashi. Pollution caused by copper and cobalt mining has not only poisoned the Katapula, a tributary of the mighty Congo River and one of the main waterways in this second city of the Democratic Republic of Congo, but has also induced widespread illness. / AFP PHOTO / JUNIOR KANNAH