Glencore drugo leto odpre Katanga rudnik v Congu, več kobalta bo prišlo na trg
http://seekingalpha.com/news/3250987-cobalt-s-rise-risk-reopening-mothballed-glencore-mine?app=1&uprof=45#email_link
http://seekingalpha.com/news/3250987-cobalt-s-rise-risk-reopening-mothballed-glencore-mine?app=1&uprof=45#email_link