"The term urban mines is often misused," [Markus Reuter] told IM. "Mining implies finding new sources of value. But the important thing is sustainability - closing the loop," he added.
"There is no need to waste taxpayers' money by reinventing the wheel," Reuter said. "With the digitalisation of existing technology and systems, we can work to optimise what we already have and improve it," he added.
"[Nippon] are possibly working on the same process as us," [Chenna Rao Borra] told IM. "But they haven't published anything, so it's difficult to know."
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