From Grist: There’s a greener way to obtain necessary metals.
, nickel farming might just prove a more attractive option.
“At this stage, phytomining can go full scale for nickel immediately, while phytomining for cobalt, thallium, and selenium is within reach,” van der Ent said. While van der Ent’s team has won over some in the mining industry, adoption of phytomining isn’t yet on the fast track. That’s despite the Malaysia plot and other examples suggesting that while plants are of course less capital-intensive and more environmentally friendly than traditional mining, they are also more efficient.
Those nickel-rich soils, however, are becoming increasingly scarce—and it might well be that an undersupply eventually drives more and more companies to embrace phytomining. That, and the fact that bio-ore contains 20 to 30 percent nickel by weight and is also more compact and cheaper to transport than typical ores—which hover around the 1 percent to 3 percent mark by weight.
Currently, as strip mining happens, the surrounding topsoil becomes littered with toxic metal tailings. This layer typically has to be dug out, carted off, and sold to landfills, often at great cost to the mine operator. In the case of coal extraction, the cost of rehabilitation for strip-mined land averages
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