Justices gave a mixed reception to Republican-led states and coal companies seeking to bar the EPA from issuing a sweeping plan to reduce carbon emissions from power plants.
ExynAero, a fully autonomous drone for exploring and mapping GPS-denied environments, can be flown down drifts or into stopes to detect and localize any hazardous gasses.
The technical report highlights a robust, long-life operation with average annual production of 72.8 million lb CuEq over the first 15 years of mine life.