In vast warehouses at the Kamoa copper mine in the southeastern Democratic Republic of Congo, mountains of reddish rocks pile up as the machines grind away day and night.

The ore is used in many products including electronic devices like smartphones and computers, as well as electrical wiring, motors, and generators.

In vast warehouses at the Kamoa copper mine in the southeastern Democratic Republic of Congo, mountains of reddish rocks pile up as the machines grind away day and night.