SYDNEY Big international mining companies like BHP and Rio Tinto made it through the crash in global commodity prices by slashing costs, shedding less productive units and taking full advantage of the economies of scale their vast operations provide.
Now, with prices moving up from the depths they reached in late 2015, Asia-linked mining companies are facing tough decisions about where to focus their attentions amid challenges from activist investors, allegations of corruption and environmental damage, and the imminent retirement of top executives.





