The Resolution copper project in Arizona would be a prototype for a looming era of more invasive US mines as companies run out of easy-to-reach deposits.
The Critical Investor discusses a proposed business combination that would transform an explorer into a developing producer with major assets in Nevada.
Working 50 metres (164 feet) under ground with minimal air supply, Uuganbaatar is one of thousands of Mongolians trying to make a living digging for coal.