“Butterflies are a bit of a canary in a coal mine,” he told The Canadian Press. “They’re really sensitive to changes in weather. They’re sensitive to changes in habitat loss. They’re ...

While driving on Dundee Road in Hanover Township on Friday, something caught my eye in the Askam Borehole Acid Mine Drainage Treatment System.

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 ...