Dam restrictions in China following excessive rains are also reducing hydropower capacity there, including at the world's biggest power station, forcing utilities to ramp up output at coal-fired utilities.
The company also evacuated all of its employees at Namoya mine after trucks belonging to a contractor were caught in crossfire between soldiers and a local self-defence militia.
New report argues that a high-efficiency, low emissions coal-fired station would cost less than the almost A$3 billion in subsidies handed out by the government to renewable projects each year.
A team of MIT researchers in the United States has shown that they can separate pure copper and other trace elements from sulphur-based minerals using molten electrolysis.