U.S. miners have stabilized or even increased productivity at both surface and underground coal operations in the past two years, a study released Monday shows.
A chart by the Wall Street Journal shows that capital expenditures by the big oil companies are exceeding cash flow at a higher rate than the major miners.
Vale's Murilo Ferreira has been nominated as Petrobras' next board chairman, while the company still scrambles to deal with the fallout from a vast corruption scandal.