The idea of using plants to farm metals can no longer be considered new. Phytomining (as it is technically known) was first talked about in the 1990s, when scientists recognised that some plant species naturally accumulate abnormally high concentrations of certain metals. A good example is nickel…. A normal plant has about 20 mg of nickel per kg of dry mass, but in plants called hyperaccumulators this concentration can be as high as 20,000 mg/kg or 2%. This is more than some