Greenland has awarded UK-based company London Mining a 30-year licence to build and run a giant iron ore mine, but some opponents say the open-cast mine will cause environmental damage; others are concerned about plans to bring in up to 3,000 mainly Chinese workers, reports BBC News. London Mining has been awarded an exclusive 30 year exploitation licence for its 100% owned Isua Project in Greenland. This licence is a significant step in the process of seeking partners for the development of Isua.