Pollution fighters sue Kennecott over mining dust

Environmentalists are planning new protests over the project.

Overcapacity and a "slow-moving property crisis" will see China continue to export its cheap copper, dragging down prices elsewhere.

The mine is part of BHP's Minerals Americas business that also includes Spence.

The after-tax $1.5 billion NPV increases to over $2 billion, in contrast with a February pre-feasibility study.