Posted: Nov 10, 2019 2:10 am
felltoearth wrote:It would probably be more feasible to mine a landfill for recycled resources.
Something like that has been happening in my neighbourhood for more than ten years. Hundreds of millions of tons of what was considered overburden have accumulated next to the dozen or so open-cut iron ore mines surrounding my town over several decades. New technology made it economically viable to comb through most of those giant mounds and retrieve ore from them that was once considered not worth filtering out.