Hélène Nguemgaing

Assistant Clinical Professor of Critical Resources & Sustainability Analytics, University of Maryland

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Hélène Nguemgaing

Acid mine waste turns rocks orange along Shamokin Creek in Pennsylvania.

America’s next big critical minerals source could be coal mine pollution — if we can agree on who owns it

Hélène Nguemgaing

7 hours ago

4 min read

Down To Earth

www.downtoearth.org.in