Using Resources

1) What is Photomining ?
This is a method of extracting metal compounds from low-grade ores using plants
When planted they absorb copper compounds through their roots and store it in their tissues
After grown, they are harvested and burned leaving ash
Ash contains copper compounds and then extracted from ash by electrolysis or displacement irons.

2) What is Bioleaching ?
Process using bacteria to break down low grade ores
Produce leachate containing metal compounds (can be extracted)