Elon Musk drew attention to a decades-old converted underground limestone mine in Pennsylvania his Department of Government ...

But, today, that mining has hollowed out the ground beneath us. Pennsylvania’s inventory of abandoned coal mines is larger than that of any other state in the nation, and the Keystone State has ...

Corsa released an update on its internal lab analysis that suggests the presence of PGMs in its coal refuse disposal material. According to a Corsa corporate report, a South African mineral research ...