“Get 50 used phones for 150 yuan ($21) and remove their CPUs. Pour in the stripping powder. Then add hot water, followed by an eco-friendly displacer to adjust the pH of the solution before dipping ...

The life of a discarded smartphone does not end when its owner gets a shiny new replacement. Many people cast the old model aside, sending the bundle of metal, battery acid, and plastic to a landfill, ...