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Cleaning Up Polluting Mines With Plants–Plants That Then Turn Into Precious Metals

One enterprising scientist thinks we’re close to creating a whole new, much greener mining industry.
Nothing grows here at Walker Ridge. Oaks, pines, and wildflowers stop abruptly at the edges of a huge swath of bare earth. The dead zone–tinged an uneasy shade of green–stretches almost as far as the eye can see in one direction, down a slope that feeds directly into a watershed. Piles of dirt, scraps of rust-eaten metal, and a few crumbling bricks seem the only signs left of this

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