Using plants to clean contaminated soil
October 17, 2016
In the last couple of centuries humans have done a strange thing: we've dug the biggest pits, the deepest holes, and the longest tunnels the world has ever seen, all to find the most insidious and subtle poisons known to our mammalian bodies.
What we need is a device that can suck toxins out of the soil and either turn them into something harmless, or concentrate them in something lightweight and removable. No one has much money lying around to invent such a device, though, much less to manufacture millions of them and send them to sites around the world for free. Thus, these hypothetical devices would be even better if they already appeared around the world. It would be best, in fact, if these machines cost nothing to create, and once created could make more of themselves, at an exponential rate. While we're at it, it would also be nice if the devices also prevented soil erosion, fed bees and other pollinators, and provided shade, beauty, a home for wildlife, and possibly firewood.