Long-abandoned coal mines may still be quietly releasing CO₂ into the atmosphere through their drainage waters.

Once a bustling copper town, this rural Arizona community near Tucson now draws attention for its low costs, desert scenery, ...

The funding represents Trump’s latest attempt at coal revitalization, but updating the nation’s aging facilities would cost ...

EDITOR’S NOTE: In the final installment in our series on geothermal energy, its availability in the West and the implications ...

Drainage from abandoned coal mines can carry massive loads of carbon dioxide, venting to the air decades or even centuries ...