TOKYO -- The U.S. imposition of controversial import tariffs is "regrettable," said Andrew Mackenzie, CEO of Anglo-Australian mining group BHP Billiton, warning that such action risks sparking a trade war.
Trade war
Trump's tariffs 'regrettable,' says BHP Billiton chief
Mackenzie warns US measures risk sparking trade war
A worker checks a machine in the underground equipment workshop at BHP Billiton's Olympic Dam mine in South Australia.
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