Iron is one of the most abundant elements on earth but pulling it out of the ground efficiently can be a daunting undertaking. Snaking through the low, green hills of southern Brazil is a 530km pipeline, the decisive link in Anglo American’s $8.2bn Minas-Rio project to extract iron ore in the Brazilian interior and ship it from a new Atlantic port. Way over its original $3.6bn budget and two years late, Minas-Rio is finally close to the point of “first ore on ship”.

For years, huge mining projects such as these have formed the backbone of global economic expansion. The world’s most important commodity after crude oil, iron ore has been devoured by Chinese steel mills, emerging as the raw material for an infrastructure-led growth spurt.

But Minas-Rio is about to deliver its first ore into a much less welcoming world. The price of iron ore has plunged more than 40 per cent this year, the worst performance across metals and bulk commodities in 2014. From an average price of $135 per tonne last year, the benchmark iron ore contract sank last week to less than $80 for the first time since the global financial crisis.