The global transition to clean energy is accelerating.  Belatedly, attention is starting to move to mineral sourcing, particularly whether the necessary critical minerals will be available in the United States.  A recent Aspen Institute report observed: “As the world transitions to a new energy mix, it will require clean energy technologies that are extremely mineral intensive. Demand for minerals is projected to rise at unprecedented rates and could generate supply shortfalls that will slow, or potentially even derail, global efforts to reach net-zero targets.”[1]