Reuters reported that Europe's No 2 copper producer KGHM remains unsatisfied with the proposed mining tax despite changes in its calculation put forward by the finance ministry.

Mr Herbert Wirth CEO of KGHM in an interview with broadcaster TVN CNBC said that "The trend is appropriate, we can see the decrease in the size of this tax, but it still can be said that it remains unsatisfactory compared with the world.”

(Sourced from Thomson Reuters)