Bloomberg: South Africa needs to invest as much as 90 billion rand ($9 billion) in new coal mines to supply power plants that are at risk of running short of the fuel as soon as 2015, an industry study found. While some of the growing demand from power stations can be satisfied by extending current coal projects, the majority will need to be met from new mines, the Green House, a Cape Town-based consultant, said in its Coal Roadmap report obtained by Bloomberg. Disagreement between mining companies and state...