Some of the world’s largest mining companies have become increasingly pessimistic about a sustained rally in global commodity prices this year after an insipid recovery in China led to a drop in first-half earnings. Duncan Wanblad, chief executive of Anglo American, said on Thursday that an “enormous amount of economic pressure” was making it hard to wager that sustained gains in the prices of its key commodities such as iron ore, copper, and steelmaking coal would take place by the end of the year. Click here to read the full article