US steel and aluminum tariffs a ‘black day for the world’ — BHP reports thatBHP CEO Andrew Mackenzie said on Tuesday thatUS President Donald Trump’s proposed tariffs on steel and aluminum imports are a “black day” for the world and businesses.

Speaking at the AFR Business Summit, the leader of the world’s biggest miner said Trump’s protectionist move was just a way of propping up an uncompetitive industry.

He was referring to the White House’s plan to hike tariffs on imported steel by 25% and by 10% on aluminum, which are expected to be discussed later this week in a meeting organized by the government’s economics adviser Gary Cohn.