From WEST VIRGINIA UNIVERSITY on May 1, 2023
Paul Ziemkiewicz has been working to clean up streams for decades, but the discovery that acid mine drainage or AMD, holds the elements used in electronics has made that effort not only noble, but potentially profitable. The most valuable — neodymium, praseodymium, terbium and dysprosium — that make high-performance magnets and others that fire up flat screen televisions, smart phones and LED lights, can be found in the leftover gunk from coal mines that turns streams orange and sterile.
https://www.youtube.com/watch?v=kc8l1Bn0yC4