We're farming plants that ooze metal.

There are all sorts of unrefined metals in the ground beneath our feet,

and some plants called hyperaccumulators have evolved to absorb metal through their roots.

The metal they absorb is running through their vascular structures in their sap, shoots, seeds and leaves.

Researchers on trial farms are harvesting plants that accumulate nickel, copper, and zinc.

The normal process for mining these metals involves opening the earth, high heat, and pollution,

so this process, called phytomining, could open up new sustainable avenues for metal harvesting.

Images courtesy of Getty Images, University of Queensland. Music courtesy of APM.