A new nature-based approach to managing oilsands tailings shows promise in the lab and may soon be tested in the field.
More oil and gas wells risk becoming orphaned given the long-term downward trend in the industry.
Indonesia's revised mining law is loose on the requirements for mining companies to close pits when operations are over, potentially adding to drowning casualties.
As coal energy loses market share, major U.S. coal companies are filing for bankruptcy. One multi-billion-dollar question: will taxpayers be forced to pay for cleaning up abandoned mines?