Several large iron ore mines have had production problems.
You may remember the large iron ore waste (tailings) dam at a huge iron ore mine in Brazil that failed.
Other iron ore mines all around the world have had to re-prove their dams are safe.
China and Australia are having a political “tit for tat” dispute over trade
(and the origin of Covid-19)
that has already affected exported wines and steam coal.
This could easily expand to iron ore and “metallurgical coal” used to make the “coke” (spongey carbon) needed for steelmaking.
