From Europe to North America, an energy revolution is breathing new life into empty, long-forgotten coal mine shafts—by repurposing them into places to store renewable energy. Using “gravity batteries ...

Converting abandoned or soon-to-close coal mines into solar farms could provide enough power to meet the demands of a country the size of Germany, according to a first-of-its-kind analysis.

Opponents of coal mining in the eastern slopes of the Rocky Mountains have some sharp criticism for Alberta's UCP government ...