South Africa’s National Union of Mineworkers handed over a memorandum demanding that Glencore Plc surrender its operating license to a company willing to control the Optimum Coal Mines units the company is planning to close. Workers marched to Glencore’s head office in Johannesburg on Saturday to hand over the memorandum outlining their demands, the union said in a … [Read more...] about South African Union Demands Glencore Surrender Optimum License