![acid mine drainage sludge sites, like this one in central Pennsylvania, are rich in critical minerals.](/sites/ems/files/styles/large/public/news/penn-state-lead-critical-minerals-consortium-powered-12-million-doe/thumbnailimg8501.jpg?itok=qr0VJ2oW)
A region famous for the coal that once fueled a growing nation is now the focus of a $1.2 million project, led by Penn State researchers, aimed at establishing domestic supplies of critical minerals needed to produce modern technology from cell phones to fighter jets.
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